Malicious PDF — malware analysis report

Static analysis result for SHA-256 969f1ecad4f86cb8…

MALICIOUS

PDF

72.9 KB Created: 2021-10-01 11:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 35d4b892ba25fbb09bf5144a5192a005 SHA-1: 417230fe7bd5e181ed4eecc9c831fd3817145b6c SHA-256: 969f1ecad4f86cb82eec7c3fb2497aa0051ab068c8a2ada9df73d8bd6d27dc21
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links to external websites, some of which are hosted on compromised CMS upload storage or disposable hosting, indicating a phishing or scam attempt. The heuristic 'SE_CALLBACK_LURE' strongly suggests a callback phishing or tech-support scam pretext. The ML classifier and ClamAV detection further support the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.pattyn360.com/upload/forum/files/xojipetiretazemopopidipos.pdf In PDF document text
    • http://advocaatindex.nl/images/uploads/46013602741.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/67093329852.pdfIn PDF document text
    • https://oreopay57.com/ckfinder/userfiles/files/buvikekebud.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/amag6830j2lnan2364so49nqsb/tifojisimodevinimufu.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/37345554323.pdfIn PDF document text
    • http://dymenahealthcare.com/upload/fckeditor/file/49532894823.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/faninosefezi.pdfIn PDF document text
    • https://adminico.nl/userfiles/file/gekidenesomigivivuxejo.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/dozemalilusupinijo.pdfIn PDF document text
    • https://dienhoanghean.com/upload/ck/files/29052061430.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/8081587496.pdfIn PDF document text
    • https://jmbarrenetxea.soinuenea.eus/files/galeria/files/jejopegas.pdfIn PDF document text
    • http://slabowidzacy.smprzemysl.pl/ckfinder/userfiles/files/kudogokozoluzatebokuwepub.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021090702013770554.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16152e950cf7ac---22378601313.pdfIn PDF document text
    • https://www.domosystem.gr/ckfinder/userfiles/files/13241896161.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021092918184617.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/160545711.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/nivevagitebe.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/92c377f4443190393579e97081a2a604/82785153483.pdfIn PDF document text
    • http://yanarfabrics.com/firma/files/34870319150.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/xomodexexoxerivixexiwot.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161434ddd0c923---bibaximifip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=ichhadhari+nagin+filmPDF 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_off0000b920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB920 10356 bytes
SHA-256: 033979889ef7ff2c396e0d7bfbd9bde45de27d0ce9ca635bb682a8db933ca1d8
font_01_sfnt_off0000cffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80F 17804 bytes
SHA-256: ef51082a6ba12400e783e1250584f4969b9a271c654a21ff172be2b0135121d1

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