Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0d8a7ead4bfae4…

MALICIOUS

PDF

72.4 KB Created: 2021-03-03 22:18:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: cf3c2d44834223eaf9b3755741a865dc SHA-1: f5129bc31df1753f6433d0b4b89484303610ba80 SHA-256: aa0d8a7ead4bfae412591d25ba8b1eda1b2d8b316835572ebeed14f56afc0e99
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or scam attempt. It contains a large number of external links, many hosted on disposable domains or using URL shorteners, suggesting a link farm designed to redirect users to malicious sites. The document body, though partially corrupted, suggests a lure related to fixing outdoor faucet leaks, which is likely a pretext to drive traffic to these external URLs.

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://gimoguvi.ru/strik?utm_term=how+to+fix+outdoor+faucet+handle+leak PDF link annotation
    • https://cdn.sqhk.co/vefoveted/o2jbSgh/rockauto_reviews_yelp.pdfIn PDF document text
    • https://bigififipajug.weebly.com/uploads/1/3/4/7/134709095/658013.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/yhcjjd7/89578010466.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/gakufuzojitililokimeni.pdfIn PDF document text
    • https://wibipujesotut.weebly.com/uploads/1/3/1/3/131398272/58b35e2749db.pdfIn PDF document text
    • https://tadinitalu.weebly.com/uploads/1/3/4/7/134744808/mulojigejakitelug.pdfIn PDF document text
    • https://natesikapepik.weebly.com/uploads/1/3/4/7/134750077/mawef.pdfIn PDF document text
    • https://fogojokiverowur.weebly.com/uploads/1/3/0/9/130969702/8b5eb1c38cfe47d.pdfIn PDF document text
    • https://cdn.sqhk.co/fajaleniwa/hfhbhdJ/siwifisuj.pdfIn PDF document text
    • https://cdn.sqhk.co/rutisifelom/gjDe0ii/34498074898.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/Mib3ihP/space_invaders_frenzy_gameplay.pdfIn PDF document text
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/jubiketirid.pdfIn PDF document text
    • http://wozekozexufoxol.scienceontheweb.net/what_do_skull_emoji_mean.pdfIn PDF document text
    • https://moraraxewurazi.weebly.com/uploads/1/3/4/0/134042425/334991.pdfIn PDF document text
    • https://fojiwuduz.weebly.com/uploads/1/3/5/3/135309278/zunobawolo.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/uichdhb/tuwobapirafopaluv.pdfIn PDF document text
    • https://fitinunajixir.weebly.com/uploads/1/3/1/6/131637477/dinibusonunofu.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/jGPhigg/gajivup.pdfIn PDF document text
    • https://fomoxizukewoviw.weebly.com/uploads/1/3/0/7/130739072/fobafite.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_off0000df7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7C 5116 bytes
SHA-256: 313260530d64e60bd39677363d608a55c6e5a3e152dc3a680f8200257f53b468
font_01_sfnt_off0000f0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F2 10376 bytes
SHA-256: 4d57300a6962a97ac65f86ec152584e0c567e41dcd4cf83e939593b56630c189

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