Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6a4b36127b097b…

MALICIOUS

PDF

72.7 KB Created: 2021-08-28 06:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ef083f363ba65b2cafc414d84a0bf474 SHA-1: 8b6d1cdceb14cf965cdea6300226c2c6e1d384e4 SHA-256: 5e6a4b36127b097bea1dcd9048622596fe998276efa75de700023590a315e37e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1071.001 Web Protocols

The file is identified as malicious by multiple heuristics, including ClamAV and an ML classifier, indicating a phishing or trojan payload. The presence of numerous links pointing to compromised CMS upload directories and raw IP addresses suggests a phishing campaign designed to trick users into downloading malware. The 'SE_CALLBACK_LURE' heuristic further supports a phishing or scam pretext, likely aiming to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2d26d5268---medegabuvovaforezelir.pdf PDF link annotation
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b755ce29a---gatot.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/50f6b9d89eeac56875ab2fc6c2320f86/31141248567.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b86c0e14a---kijijinuvenobupej.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210811145800.pdfIn PDF document text
    • http://porpora.eu/imagenes/imagenes_contenidos///42106277136.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/21715180313.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/53478139150.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/c0l1g7v1c0kjl9ql1ipdie3ocq/57897524840.pdfIn PDF document text
    • https://digireg.cz/upload/lexejekibobigebisawa.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/85c8f2e1ed0dfef0a512640360cb4590/konelo.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/27885953292.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/wojofedijitaropemibexef.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fd38a8108---dukivevetogajiveluju.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/99425449198.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/59358282179.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/janobiguvib.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a6fd1485d---83469021060.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/48037574886.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/puvijafapujewoputatabuveg.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/2p9nu1s8k7jnl32pv1j62i7mc7/tadibajedopigiwatimenuj.pdfIn PDF document text
    • http://klpa.net/userData/board/file/40640419532.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160a782d4ceb58---50178310048.pdfIn PDF document text
    • https://sindhuinvestment.com/ckfinder/userfiles/files/26404294086.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=fortnite+unsupported+apkPDF 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_off0000be12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE12 10508 bytes
SHA-256: f6baf0b0f798435558ff8242576d8ec42ec13a9f5c41f843e9b1a3de69fd900f
font_01_sfnt_off0000d615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD615 15284 bytes
SHA-256: 4803fce759b900b7b6ac8818f55e5993e5c09e5988cf10c8de01e3b9ec0d096d
font_02_sfnt_off0000fcf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1