Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2eb55d9e6edbe51…

MALICIOUS

PDF

74.7 KB Created: 2021-01-06 06:38:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2143f79fbf543ecffc32a2a026391e4b SHA-1: e97e15d71f6dde72d962f88b21db9b2242b78fa9 SHA-256: a2eb55d9e6edbe517cc88c292b5e0ce62af37a89978959a05aae5a8a85c44447
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, suggesting a link farm or redirection to malicious sites, with one prominent URL being trafficked. The presence of a 'download button' lure and a callback lure further supports a phishing or scamming attack pattern. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/aws?utm_term=assignment+abroad+times+14+september+2019+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391009/normal_5f9c0c6f45e53.pdfIn PDF document text
    • https://cdn.sqhk.co/jifedibodo/0ggLeaq/ww2_battlefront_simulator_apkpure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486035/normal_5fc5764f2765f.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/bRjaBgg/asian_football_champions_soccer_free_kicks.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446776/normal_5fce9c4118989.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389793/normal_5fec21bb572d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369330/normal_5ff17124c1ce6.pdfIn PDF document text
    • https://cdn.sqhk.co/xinovupu/Jzibahc/6019483937.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/13242.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453334/normal_5fefc83b16436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423452/normal_5faf49375fb60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408348/normal_5f9ecc072e740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450884/normal_5fada6e96b97b.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/jeLPHPi/461166401.pdfIn PDF document text
    • https://zomanuvid.weebly.com/uploads/1/3/4/4/134477829/6065fa90b6ddca7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/df9ba75c-e4d1-45d5-9ace-9c36724a169a/73481323991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3610fa1a-5b93-492e-9b44-c35130d41549/veguko.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE444 6028 bytes
SHA-256: 20816e174de05bb29a022eff6c3d7a9fde51455f138e257e25804d8b79a9bbfb
font_01_sfnt_off0000f8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B1 10836 bytes
SHA-256: cb0516cd54ee8c7811a913921d48de467985da3ec88815e06c066e7bdbc28c06

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