Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0951c1499a04da…

MALICIOUS

PDF

74.8 KB Created: 2021-01-12 10:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7079028f5b47af000731b9a47593665b SHA-1: 7edda431563f69c6c6b93503d01854defe107836 SHA-256: 5e0951c1499a04da8ad7ec597f1c2f53c827d070baa81a03c0d7d97297818895
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm or SEO manipulation scheme. The presence of a known malicious redirector URL and ClamAV detection strongly suggests malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/aws?utm_term=bates+motel+5+temporada++mega In PDF document text
    • https://jitipukojid.weebly.com/uploads/1/3/4/7/134707402/sabasirilozasivemub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375518/normal_5f8bc4e7d9a30.pdfIn PDF document text
    • https://sepanafawo.weebly.com/uploads/1/3/4/3/134316973/bc6f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477630/normal_5fbb0dc4d7012.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/S56Tjjw/idle_bank_office_tycoon.pdfIn PDF document text
    • https://site-1166598.mozfiles.com/files/1166598/pompa_sodio_potassio.pdfIn PDF document text
    • https://jexelokase.weebly.com/uploads/1/3/5/3/135321670/8566431.pdfIn PDF document text
    • https://site-1172798.mozfiles.com/files/1172798/newborn_baby_snake_identification_florida.pdfIn PDF document text
    • https://site-1168054.mozfiles.com/files/1168054/antennapod_gpodder_sync.pdfIn PDF document text
    • https://jakugogafezokev.weebly.com/uploads/1/3/1/4/131437362/ce5d733e3fa38c8.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/8jgcigV/pinirodaf.pdfIn PDF document text
    • https://site-1181732.mozfiles.com/files/1181732/nusevovalefipozatenajaxez.pdfIn PDF document text
    • https://gikusevenax.weebly.com/uploads/1/3/4/5/134529244/efaaf8be.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/dofufiri/69285312844.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10A 5452 bytes
SHA-256: 31b19076b6323bb5b55585ff1d434422ae9abd8eb8b9b859995fbfb1fbbe22c2
font_01_sfnt_off0000e379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE379 10996 bytes
SHA-256: 85dcecc120c46e7c8b4841d252364d3ab903ba87416562d8fe88a580dc0692f9
font_02_sfnt_off000108ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EF 16288 bytes
SHA-256: c2f59f0d99a907560a1048e7d58b70a94bd36e7c18d3b61500eee7e174469f4c

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