Malicious PDF — malware analysis report

Static analysis result for SHA-256 396fa933542363a3…

MALICIOUS

PDF

72.5 KB Created: 2020-12-23 12:02:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aa654293f0ec03169c857918fdac3e0 SHA-1: 7076d9f15d66bb702ad59e8b6f0ca1e73141fa61 SHA-256: 396fa933542363a383e210a6768606141aee520f2846b9cd5afaf4401fcbbf6a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many of which are to suspicious domains, indicating a link farm or phishing attempt. The heuristic 'SE_CALLBACK_LURE' suggests the document may also be designed to trick users into calling a fraudulent support number. While no scripts were extracted, the presence of numerous external links and the PDF structure strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://trafffe.ru/123?utm_term=indian+river+clerk+of+court+official+records
    • https://nabezaxe.weebly.com/uploads/1/3/4/8/134852032/c098e4a0c.pdf
    • https://dojufewuwi.weebly.com/uploads/1/3/4/2/134235401/c6910a4a1ef68.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc34985239b07229140aab6/t/5fcb426733fb14715cb8ec8d/1607156327696/draw_feature_in_word_online.pdf
    • https://static1.squarespace.com/static/5fc7a5bf9849b27a00a7ae4e/t/5fccf619eb18547f4b8642a0/1607267869297/72284742925.pdf
    • https://s3.amazonaws.com/gupuso/49507771468.pdf
    • https://s3.amazonaws.com/jixeremipet/mewadolivobilibijuxu.pdf
    • https://s3.amazonaws.com/murudute/liridotijijixemiworiwokox.pdf
    • https://s3.amazonaws.com/mawesenasijoser/99372101015.pdf
    • https://s3.amazonaws.com/tixedujegibex/rerurosus.pdf
    • https://static1.squarespace.com/static/5fe12d71b3a45d4e1c37cccc/t/5fe270c642eab01570ad49cd/1608675526884/zawarijaxumitatunubudebo.pdf
    • https://s3.amazonaws.com/gitipelut/percutaneous_left_atrial_appendage_closure_guidelines.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deb1.bin
8583bcaee73645273dec1d8f30c6f57f96ecaad76fdb05a517982a3068524a76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB1 5076 bytes
font_01_sfnt_off0000f00e.bin
b5b3a41742615f704d93f1f021367b11fa17f0926d7127f6990c7d30fe9885ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF00E 10828 bytes

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