Malicious PDF — malware analysis report

Static analysis result for SHA-256 b07c5c3e75f90b54…

MALICIOUS

PDF

71.9 KB Created: 2021-04-06 00:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1e9ce7a04f63807898dbb9478e07f502 SHA-1: 10cf856d8317b18166330bef8ce41f92a0550db7 SHA-256: b07c5c3e75f90b542262c21ce8cdf29b46d7fa82bd7a2c9f90d40197b921cc15
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam campaign. The document body, though heavily obfuscated, appears to contain keywords related to a Hitachi miter saw, likely a lure to attract victims. No scripts were extracted, but the PDF structure itself facilitates the distribution of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://ponafet.ru/strik?utm_term=hitachi+c10fce2+10-inch+compound+miter+saw+home+depot PDF link annotation
    • https://fujovufizopi.weebly.com/uploads/1/3/2/7/132710671/karux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405409/normal_60156539aab2e.pdfIn PDF document text
    • https://jedegifopa.weebly.com/uploads/1/3/0/7/130738854/8be25f5a4a775.pdfIn PDF document text
    • https://xomixosusanit.weebly.com/uploads/1/3/1/4/131438267/aa87816d7.pdfIn PDF document text
    • http://lyudi23.ru/3279992358ox509.pdfIn PDF document text
    • https://botoriki.weebly.com/uploads/1/3/2/6/132682976/lexelawujema-rituxu-zotenuj-todono.pdfIn PDF document text
    • http://mscredit.info/healthy_food_guide_pyramidnqco5.pdfIn PDF document text
    • https://bovuxugiz.weebly.com/uploads/1/3/4/9/134901291/vafejiko.pdfIn PDF document text
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/luriwidekotofunaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385617/normal_6039843b20175.pdfIn PDF document text
    • https://wugupuvexiso.weebly.com/uploads/1/3/0/9/130969254/3476947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374211/normal_605920303ec9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463298/normal_606a8c70e0d42.pdfIn PDF document text
    • http://123dutch.com/yamaha_rx-a700_manualjnjih.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402960/normal_5fccd8ba4c590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_6027e4cde98b4.pdfIn PDF document text
    • http://websporizle4.com/mebagefngmqk.pdfIn PDF document text
    • https://wexasubofuxumeb.weebly.com/uploads/1/3/2/7/132740188/bbfd1.pdfIn PDF document text
    • http://loveantravel.xyz/nalunuzasexiriwufopurzq94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449419/normal_6040f800bda3e.pdfIn PDF document text
    • https://lipamonevarila.weebly.com/uploads/1/3/1/4/131453989/pijozilikuwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_605315d421009.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454995/normal_5fecc8406e3a7.pdfIn PDF document text
    • https://wejigewaja.weebly.com/uploads/1/3/5/4/135400860/xemok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mogipegi/33087780382.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/air_force_1_valentines_day_price.pdfIn 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_off0000d77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77F 5776 bytes
SHA-256: 830d271ad57231685b2c6ba125b55a4fced75b2db5d49c2fa331e0ae35ff5936
font_01_sfnt_off0000eb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 10764 bytes
SHA-256: 00110628e4104dfb7f186c55a3bd1f11cf7e5b028468acf096fedda61a2807e3