Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0b2668798859d5…

MALICIOUS

PDF

82.1 KB Created: 2021-09-05 19:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 36cb550f8054e0f9880a06d1af37c23d SHA-1: e0b05e25160adfc0dc979fed17ac3906c49a00a0 SHA-256: 8a0b2668798859d5eb62ccb714defda0bae3bfb0e06ec8ed2a5dff09178a256d
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, with one pointing to a raw IP address, indicating a malicious intent to host or redirect to malicious content. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam pattern, where the user is prompted to call a phone number. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://spalovnachemolak.sk/userfiles/file/80248494782.pdf In PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607b653dec888---pugajena.pdfIn PDF document text
    • http://ohsclassof73.com/clients/9/9a/9a21b0b253f7c4eafe662346d237c286/File/pobemok.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb74b53da6---77234624344.pdfIn PDF document text
    • http://esistore.be/userfiles/file/tonuwidurezubofuge.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/ubaa2qvaofekhsd5n378jclov8/redapakujagotidiro.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/65160687659.pdfIn PDF document text
    • http://tuyothuyluc.vn/webroot/img/files/33316815710.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/losexukufape.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/79688091769.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/55050626b3be1b00cdcaead342b45615/xavasedepiposi.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e914184e9a---dukagagexizivunidumav.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/tizinepumidunize.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1184c8ba0---debofodelerajobaporupa.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cd99a9adef8---46383395525.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/52502171025.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/b8733aa1cfe030fe2019974d55377f63/dimibame.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/vizix.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/dolebimaxavad.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/d2f50ec078096c1fac62f6b168c7fd01/wigileg.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/nazegujekiwomekeju.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/telumakixaturafufesuw.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/5kolrmcf4usub5q97th21o4nu2/31705701876.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca38d16072---23764673.pdfPDF link annotation
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=divine+mercy+chaplet+in+latin+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9D 10780 bytes
SHA-256: f1f4284dc035e827c04189c07808c4f287364e4b7e2ddd04d0e91252b867e73a
font_01_sfnt_off0000f33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33F 18364 bytes
SHA-256: 2bd70ba36bdb84e98045fbd031e359c9a887e6bfa386c5271a9a521e836d5b43
font_02_sfnt_off0001229e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.