Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb19ae8c3aaa57e…

MALICIOUS

PDF

77.6 KB Created: 2021-03-08 15:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3fbf6eb0cd64f72db0956b5fe7b8e872 SHA-1: 1ee348d8b9d345114eddab003a45014313473f34 SHA-256: ffb19ae8c3aaa57e2e6d565e9dd9e7ccc7f9a9f7b403d9cf2a3a0e84e39e5182
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous external URLs points to the document's role in directing users to potentially harmful content.

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
  • 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.
  • 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://soxebez.ru/123?utm_term=go+to+sleep+lullaby+sheet+music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500878/normal_603f4d7a81819.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/hmp_hewell_reportcchx3.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/star_wars_ahsoka_actress.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487622/normal_6032f0f6d3560.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391896/normal_5ff129469ce19.pdfIn PDF document text
    • https://loxogekero.weebly.com/uploads/1/3/4/0/134040689/14d314666.pdfIn PDF document text
    • https://baxemajoxololur.weebly.com/uploads/1/3/1/0/131070692/ririto-vujazawub-kirufapeminuzu-vojox.pdfIn PDF document text
    • http://makeyourself.xyz/benagomakunifomozc9p2r.pdfIn PDF document text
    • https://femidizori.weebly.com/uploads/1/3/4/6/134684525/8198175.pdfIn PDF document text
    • https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/fobejowidewe_tekufenumej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452621/normal_5fea402140488.pdfIn PDF document text
    • https://pusiruse.weebly.com/uploads/1/3/4/7/134717846/6cbea.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/sixoxut.pdfIn PDF document text
    • https://jetisinodab.weebly.com/uploads/1/3/5/3/135335938/xabufepubebapemubema.pdfIn PDF document text
    • https://nurerimufiwovu.weebly.com/uploads/1/3/4/3/134394752/8812923.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gesumorazawetum.rf.gd/marks_standard_handbook_for_mechanical_engineers_8th_ed._mcgraw_hill.pdfIn PDF document text
    • http://wudobew.epizy.com/guideline_meaning_in_vietnamese.pdfIn PDF document text
    • http://romewedupa.epizy.com/why_ip_camera_offline.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/aflatoxin_in_peanuts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F3 5124 bytes
SHA-256: 6792dea668d3d1e420a33dbe2d342e10b5154b32a4bafc4daa2eae1fa5f3bec4
font_01_sfnt_off0000f671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF671 10788 bytes
SHA-256: b631417178ed5299a94a513cf717e0aa1276f64370a3d81ba6af26b100f62254
font_02_sfnt_off00011b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B25 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.