Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9ecc6f617ef229…

MALICIOUS

PDF

79.1 KB Created: 2021-03-31 01:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aeafdd23054ef9b76f8363af4403ad6 SHA-1: 543e835c45cd74f44a2aa77d7c1b8ab4039d3889 SHA-256: fb9ecc6f617ef229f980f47e39ed705cc3407b50475cd57db5458e23fb661f47
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to other PDFs, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/award?keyword=ecg+changes+in+myocardial+infarction+pdf
    • https://bapefakujina.weebly.com/uploads/1/3/4/4/134483882/8fc49fd.pdf
    • https://cdn.sqhk.co/vumorumuvogi/Rjajbhf/man_city_quiz_questions_and_answers.pdf
    • https://cdn.sqhk.co/bilexodofose/hKjhVev/39958773012.pdf
    • https://fibepuranes.weebly.com/uploads/1/3/4/0/134041348/pigapusibomemujen.pdf
    • https://tebojejuket.weebly.com/uploads/1/3/4/7/134764489/5749465.pdf
    • https://cdn.sqhk.co/kululojilo/XnYdjf9/69748427416.pdf
    • https://xesusesubo.weebly.com/uploads/1/3/4/3/134348975/wanejodokodid.pdf
    • http://sovetnik53.ru/peter_f._drucker_libros173p9.pdf
    • https://pilinasovoda.weebly.com/uploads/1/3/4/1/134132167/kipusutegedupi.pdf
    • http://prizinsta365.online/lexus_es300_headlight_replacement3wumd.pdf
    • https://ginugifugebiner.weebly.com/uploads/1/3/4/2/134234672/994ba8.pdf
    • https://cdn.sqhk.co/jobiwokojo/ghieT5r/56135190962.pdf
    • https://wexarasi.weebly.com/uploads/1/3/4/3/134351888/6577356.pdf
    • https://zozabamefopofa.weebly.com/uploads/1/3/4/2/134234868/5167970.pdf
    • http://trastqort.online/basf_se_financial_report9w1a1.pdf
    • https://cdn.sqhk.co/nadetajagupe/Xp4jfDk/don_t_rush_meaning_lyrics.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dukavunivifa/89743726064.pdf
    • https://uploads.strikinglycdn.com/files/e509dc60-1901-4774-b47a-707faeb00964/sojabader.pdf
    • https://s3.amazonaws.com/napoledunadigo/video_er_professional_extension.pdf
    • https://uploads.strikinglycdn.com/files/3fa9509e-3e79-4f4c-91e7-b3350fbdcd6f/dujulot.pdf
    • https://s3.amazonaws.com/daxemo/22597646259.pdf
    • https://uploads.strikinglycdn.com/files/0ce5a367-d4a4-4855-bcc0-f0d77b1767d0/vagigilomitelilivute.pdf
    • https://s3.amazonaws.com/lolaritemukole/gevepemufozuguwa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f64e.bin
6b9ad14923a25f57e9186a1a3b54a7a38d4435cc1362d00fcf1f98ca1433c3e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF64E 5628 bytes
font_01_sfnt_off0001095f.bin
9c2afa52e415422230205c7980d7cceb5bcaf22cb73fb5b3395ae2560c8070ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1095F 11592 bytes

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