Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3347ec31d659834…

MALICIOUS

PDF

83.6 KB Created: 2021-04-06 14:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 813e573657df7fa55f94d6f5ac601368 SHA-1: e49cfa9fa3ee998eb7fa7c143bd11e5ce6ef97c2 SHA-256: e3347ec31d659834372c2a633d5fd8f82d62298b72dbfaa049a183c373ceb75c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains a large number of external links, suggesting a link farm or redirection mechanism. The embedded content, though heavily obfuscated, likely serves to disguise the malicious intent and direct users to external URLs for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/award?keyword=basketball+conditioning+program+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386330/normal_604ec1efbbb22.pdfIn PDF document text
    • https://cdn.sqhk.co/vomuvojovi/hhj27FH/76529513115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_602f49d4f0498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392647/normal_6051ad5ed2f13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490949/normal_604f4adcc00e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405184/normal_60251e9842b77.pdfIn PDF document text
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/5845350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_6058077fd92c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491410/normal_60699b5391f64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456666/normal_5fefb8b1f320a.pdfIn PDF document text
    • https://tamilazubi.weebly.com/uploads/1/3/4/6/134604156/wowow-xafonukovadazu-gefixilunegoze.pdfIn PDF document text
    • https://cdn.sqhk.co/bowazeduz/k3Rgjgd/pipivu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421336/normal_60037c5f791eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471234/normal_6017536f17446.pdfIn PDF document text
    • https://cdn.sqhk.co/noligigibar/djiibyi/beard_straightener_brush_reviews.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369163/normal_5fed0965d3a38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479916/normal_605c20195b5d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393019/normal_6000c339bd7d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486051/normal_604de45feed8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450883/normal_600f74cc823b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374851/normal_5fd5f5e4a8806.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421787/normal_5ffa41d9df954.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469350/normal_5fca7f2a5f18c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10514 5728 bytes
SHA-256: 807d9386c14436e1144ed7ae5242e80e74b84d2b351e16707e102b4414f2a244
font_01_sfnt_off0001187c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187C 11956 bytes
SHA-256: 11c4e4684cb340e76da2ac723c760fecf256ccb4c6fcb6f2034f346c25962919

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