Malicious PDF — malware analysis report

Static analysis result for SHA-256 758f6972fc8eaa56…

MALICIOUS

PDF

72.1 KB Created: 2020-11-20 13:20:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95bdda8cce1d44e818d1269170375fdb SHA-1: 5a705f5926e2beb249ef322b8a94d37020a31044 SHA-256: 758f6972fc8eaa5663a26717c6dc0af9e0cf79dad8ecd63c51d9afb9113cb1d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO link farm. It contains numerous external links, with a primary URL pointing to 'traffnew.ru', suggesting an attempt to redirect users to potentially harmful content. The presence of a link farm heuristic further supports the conclusion that the document's primary purpose is to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=hawaii+vehicle+registration
    • https://cdn-cms.f-static.net/uploads/4469831/normal_5fb5bbe07bf80.pdf
    • https://pegelukiratek.weebly.com/uploads/1/3/4/5/134503056/xetidaxa_rapubunusis.pdf
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5f9040b6c2588.pdf
    • https://cdn-cms.f-static.net/uploads/4462096/normal_5faf034db2af3.pdf
    • https://faxitovi.weebly.com/uploads/1/3/4/3/134379512/2bdbc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/juzowilipi/popcorn_time_apk_for_apple_tv.pdf
    • https://s3.amazonaws.com/forupokisip/definicion_de_contaminacion_ambiental.pdf
    • https://uploads.strikinglycdn.com/files/1d522225-e178-4b14-9201-4103ddc8a971/wopenegukewawe.pdf
    • https://uploads.strikinglycdn.com/files/574b17ab-382c-43f8-9dc3-996f9e394bb6/55256671910.pdf
    • https://uploads.strikinglycdn.com/files/33f4c062-1ffe-4555-9ade-fa51f3774fa8/samsung_bypass_activation.pdf
    • https://uploads.strikinglycdn.com/files/c45a6698-f33e-4079-a934-865f131034c8/92268903208.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf26.bin
2f462ce4ac42b26427704d8ebc3028b10fa7c8ff44e668c5efb2f994c0e93526
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF26 4960 bytes
font_01_sfnt_off0000e009.bin
1e418b040f3067eb6de9c9ae3f7c1b8c293233e8dce0ea87ca6fb7c9d3de4cd5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE009 10996 bytes
font_02_sfnt_off00010595.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10595 4324 bytes