Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b97451f519a76b9…

MALICIOUS

PDF

68.0 KB Created: 2020-11-30 13:01:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02c76e37032e90fc55896f0fe6ab4668 SHA-1: 1a1254dcfb18793057c79f79808af73e705d3343 SHA-256: 2b97451f519a76b99e89ad48a2f886ffcdd4f33fc37fe245cb53ff7ec9e930ff
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' indicating a large number of outbound links. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the presence of external links and the nature of the heuristics point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/aws?utm_term=blank+wine+label+template+free
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/0c5ff9f6c402.pdf
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/3af0492767d6.pdf
    • https://sewuvemap.weebly.com/uploads/1/3/4/3/134377394/vaxenozekep.pdf
    • https://tunomofezu.weebly.com/uploads/1/3/2/3/132303147/901e3e6a23a3ffe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd3ba620c6756c0d7b311a/1606237095957/wijadisuligolufijamutegof.pdf
    • https://s3.amazonaws.com/numegubowalonan/tinesokuladegowa.pdf
    • https://static1.squarespace.com/static/5fc1d3b3f9866f3fd2dadad4/t/5fc43bb94e98326c0298003e/1606695868662/sezewi.pdf
    • https://s3.amazonaws.com/tesotiwapax/88232600697.pdf
    • https://s3.amazonaws.com/lodazojamuva/pay_stub_direct_deposit.pdf
    • https://uploads.strikinglycdn.com/files/e7da4aa9-59aa-4c4c-917a-24743af0d8f2/zeponazitisaludaxuxuluro.pdf
    • https://uploads.strikinglycdn.com/files/8db9c477-5589-48b8-b537-bda52b4267a2/heart_rate_cancer_symptoms.pdf
    • https://uploads.strikinglycdn.com/files/d11c074a-a14b-40de-8b96-1d6e10b3ba1f/8257024551.pdf
    • https://s3.amazonaws.com/nuvukivaxiren/aggregate_reporting_in_pharmacovigilance_jobs.pdf
    • https://uploads.strikinglycdn.com/files/a48ba21e-827c-4cd2-8662-46846c2d051c/89508837045.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_off0000cef5.bin
22cbd4ac4725657567eb475d632a0dc3c467ff15a63bb784a50dd4d707f05755
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF5 5212 bytes
font_01_sfnt_off0000e0ae.bin
1a704537896220068e82a2a1f2f6f00140faa06c8c2a0354ce451ff6076b56d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AE 10132 bytes