Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0bc83785dba492…

MALICIOUS

PDF

76.1 KB Created: 2021-03-17 18:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a7014362c1e8562acbad86c9cdacc62 SHA-1: d7ec3b8db55ce694b6bc6aec1838d56bccc2ceb0 SHA-256: 2b0bc83785dba492b2d7f9e989d813ebf456f72ec39c711d2922cd4f1e8a531d
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on Weebly subdomains, suggesting a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ponafet.ru/award?keyword=online+book+pdf+site
    • https://vodemilofokuse.weebly.com/uploads/1/3/4/2/134235674/palibivofivabu.pdf
    • https://tesegape.weebly.com/uploads/1/3/5/3/135387632/2264389.pdf
    • https://kenaveduku.weebly.com/uploads/1/3/0/8/130813649/sefaloxanu.pdf
    • https://tiwofimobodes.weebly.com/uploads/1/3/4/0/134040820/2913273.pdf
    • https://vulazijol.weebly.com/uploads/1/3/4/6/134648863/d5988df9.pdf
    • https://static.s123-cdn-static.com/uploads/4449629/normal_5feaff8e29d82.pdf
    • https://siwufofewexiv.weebly.com/uploads/1/3/5/3/135329456/6791666.pdf
    • https://static.s123-cdn-static.com/uploads/4366401/normal_5fde9170accb7.pdf
    • https://cdn-cms.f-static.net/uploads/4460708/normal_6044bbc525c65.pdf
    • https://cdn-cms.f-static.net/uploads/4451955/normal_6044221297cf3.pdf
    • https://sunitago.weebly.com/uploads/1/3/1/8/131856801/toxaxejil-zadisudaxamedip-fovakami.pdf
    • https://cdn-cms.f-static.net/uploads/4451356/normal_602de1e858378.pdf
    • https://cdn-cms.f-static.net/uploads/4385862/normal_5fd295a592716.pdf
    • http://tinivoze.22web.org/42826603909.pdf
    • https://cdn-cms.f-static.net/uploads/4447916/normal_604cdd0d2f4cf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ladorum.epizy.com/27081569245.pdf
    • http://pasobopupolom.rf.gd/sims_3_cc_furniture_sets.pdf
    • http://vibiwarufade.rf.gd/poulan_pro_pole_saw.pdf
    • http://niwanabumupe.epizy.com/wibegebeweju.pdf
    • http://mexesumofiruvaf.rf.gd/muganaxatu.pdf
    • http://wufuxabarerinuw.epizy.com/free_romance_novels_to_read.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_off0000e9b4.bin
439278b000cf575fb24dde0ddc1566b20a7f18610f8e4bb7bc6ffd7ea526820e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B4 4960 bytes
font_01_sfnt_off0000faa6.bin
818d9e7271da2b4832acadbc63aec892fe96da9343da56aa37ebd9666f152aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA6 11588 bytes

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