Malicious PDF — malware analysis report

Static analysis result for SHA-256 885670dacdf1e03d…

MALICIOUS

PDF

77.5 KB Created: 2020-12-05 10:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 214b92c8522d4d6a6edf498ffab96625 SHA-1: b2e73650fbe165f72429fdfd187102258f2e25c5 SHA-256: 885670dacdf1e03d0092f6845aeb732e53561e0ed5a3119d22e31863dc39dc95
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure (ggtraff.ru). The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute multiple payloads. The presence of urgency language further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ggtraff.ru/aws?utm_term=golfshot+pro+user+guide In PDF document text
    • https://tololomajaju.weebly.com/uploads/1/3/4/4/134472688/6013652.pdfIn PDF document text
    • https://dinufipaxa.weebly.com/uploads/1/3/4/4/134440308/gavopadesagipud.pdfIn PDF document text
    • https://kexawugidatenak.weebly.com/uploads/1/3/4/3/134338825/9614653.pdfIn PDF document text
    • https://migirebunimalab.weebly.com/uploads/1/3/1/3/131383914/2aa4e7db4.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/7062931.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/befarekogol/audio_engineering_101.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/86198651062.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/xodelekapazibezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80625080-1d92-4eaf-920f-06ec4e0dfbd8/el_librero_de_gutenberg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be533183-fb04-4ca4-bb22-cad75a673912/bosivezo.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/nujirawivetonoli.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/xejaxew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a59f7734-49bb-41f7-9cfa-47976304d0c3/bomazuduxi.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_off0000f32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32A 5124 bytes
SHA-256: ffcbe26edcbf36921ea35aa6790c3488f5bb82d60d28dae215355f7afa7e1e9c
font_01_sfnt_off00010498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10498 10788 bytes
SHA-256: 11a2cab44dd972866018010fcdf7695a5001785a14a69b0f466543296098cc47

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