Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7babfba32921435…

MALICIOUS

PDF

76.4 KB Created: 2020-12-19 14:51:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f95601a7d12c521fc095f7211ca59c8b SHA-1: 9708d5c45c903330de6d2b14435d7fbadc9613a0 SHA-256: a7babfba329214352f2b8f432173a8f9a5998984dd87f7edb8dfbfe5924c5a10
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, including one pointing to a PDF that appears to be part of a link farm designed to distribute further malicious content. The document's content, though heavily obfuscated, suggests a lure related to a 'police incident report form'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/aws?utm_term=police+incident+report+form+ks2 PDF link annotation
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/c7a26d6cd7dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420761/normal_5fb533974e1b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370275/normal_5fca44f9cb63f.pdfIn PDF document text
    • https://lewofadexireg.weebly.com/uploads/1/3/4/8/134868993/73b5d53f8ec.pdfIn PDF document text
    • https://vufevilasok.weebly.com/uploads/1/3/4/3/134314299/kogopudewekubogugo.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/pizexopenaxu/fosajiweneregudup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eb17bf2-ed13-4ec6-8e5c-073d8ba05671/self-perception_theory_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8675677-8da8-4f47-9868-48975739beb6/12325182531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f1407db-e97b-4ccf-a26f-9e58fd4ca57e/zedasamaferarakezimakibak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70b69b67-9c0d-47e0-b960-56fd482e408f/catalogo_schneider_electric_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a05d8d-7156-446c-8bbf-eaaea6c8ecac/wudef.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/trial_by_fire_album.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f29c48b1-26bd-46cb-8500-56b0199eed29/87444628585.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/nylaarp_service_make_my_payments.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_off0000f04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04A 5288 bytes
SHA-256: 04b29a2016e1a91403f158d9838ebbc8c3c9e88d2e7639b47a0328e4384ce9c3
font_01_sfnt_off0001023a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023A 10048 bytes
SHA-256: a3f5d07f4fb69fc89f6ce423b3d95a22de59b1d0f0846748c2f0cdd7f9b9b67b

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