Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe262475fed2147…

MALICIOUS

PDF

92.7 KB Created: 2021-05-30 21:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 345b8be735e0b5c211e6fa67aba3baff SHA-1: 2870df12576e05416ca1605c9d46bb91b6dab592 SHA-256: cbe262475fed214715b8b1922a43f5a066205297d211340a8bb9733d6cac52b1
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs point to various disposable domains, further supporting this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8227

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
  • 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
  • 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://zajinet.ru/strik?utm_term=anganwadi+worker+form+delhi+2021
    • https://ravijirigiraga.weebly.com/uploads/1/3/4/6/134649302/juvijebataletunudo.pdf
    • https://girakojazesu.weebly.com/uploads/1/3/4/6/134675992/firebaredigo.pdf
    • https://bevifosadorafot.weebly.com/uploads/1/3/1/8/131856546/aa3963c.pdf
    • https://migobajiker.weebly.com/uploads/1/3/5/3/135390735/sumotipimadanane.pdf
    • https://xexifenenufomag.weebly.com/uploads/1/3/6/0/136082553/sazubulorux.pdf
    • https://cdn-cms.f-static.net/uploads/4476150/normal_6049e92679a89.pdf
    • https://nowigusoludi.weebly.com/uploads/1/3/4/2/134266380/53eb004eb044c.pdf
    • https://ropababiw.weebly.com/uploads/1/3/4/6/134667017/vabunugaxefototibi.pdf
    • https://pijuvadugodawa.weebly.com/uploads/1/3/4/3/134307721/6229894.pdf
    • https://cdn-cms.f-static.net/uploads/4386834/normal_603bb32e868fc.pdf
    • https://soranetibipuve.weebly.com/uploads/1/3/0/7/130738631/vixuwoxibobom-gomapumon.pdf
    • https://dudefusuze.weebly.com/uploads/1/3/4/6/134628774/zixonuzizenen-kedibufemi-litexokapupi.pdf
    • https://jamibubobew.weebly.com/uploads/1/3/5/3/135322635/zivobake-xadomopuk.pdf
    • https://xojozojejaxito.weebly.com/uploads/1/3/4/8/134866115/0038468f7b10f1f.pdf
    • https://weniwekozeg.weebly.com/uploads/1/3/4/0/134012595/duxoleruk-xajilisojiduzef.pdf
    • https://ginataxidorivez.weebly.com/uploads/1/3/4/0/134041929/5838672.pdf
    • https://warenumew.weebly.com/uploads/1/3/4/8/134871813/75075.pdf
    • https://vevuduwas.weebly.com/uploads/1/3/0/7/130775740/4626307.pdf
    • https://tugovupovo.weebly.com/uploads/1/3/1/3/131380456/zesot.pdf
    • https://riwurarelix.weebly.com/uploads/1/3/4/4/134484082/8153138.pdf
    • https://repositugi.weebly.com/uploads/1/3/0/7/130738607/napibixuronu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011585.bin
6aedcd35b0fbcfda6d6fa195e3c118419fee46a777ce59ef2218d17207055ec8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11585 5612 bytes
font_01_sfnt_off0001288a.bin
56f49a51a307248f12623a1f7399c3a9cb0685586f7171803fd84cca7b35fce2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1288A 5484 bytes
font_02_sfnt_off00013c0e.bin
9bb1bd9e43139f51bf4593bb90175de6ec7c098fc69c8eea151d37a463bdbaf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C0E 11392 bytes

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