Malicious PDF — malware analysis report

Static analysis result for SHA-256 389d968aa267e404…

MALICIOUS

PDF

84.3 KB Created: 2021-03-15 22:51:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e65a769af67904cebccdfc5b4579d395 SHA-1: da94aebef69c2fd2fdbea5a92fe6aa38f6e3c229 SHA-256: 389d968aa267e404f564153f48318ad416901a6f5c1eb4eee03d8ff6d2df8b99
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the external links points to a PDF hosted on weebly.com, which itself contains further links, indicating a potential chain of redirection or content delivery.

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://midufefew.ru/wix?keyword=pink+and+black+baby+shower+cake PDF link annotation
    • https://paxuwuberuluza.weebly.com/uploads/1/3/1/3/131380725/55267e10581f.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxofepure/dhehjNz/jungle_runner_android_game.pdfIn PDF document text
    • https://pojazamajalo.weebly.com/uploads/1/3/4/7/134728500/pifepevux.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/ijwgfVT/33340712287.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/jfNDgiP/audio_cutter_and_joiner_software.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/kumuvuzu.pdfIn PDF document text
    • https://fesifikigit.weebly.com/uploads/1/3/5/3/135319823/f273ba3.pdfIn PDF document text
    • https://minizaderi.weebly.com/uploads/1/3/4/3/134344024/vidas-pitevisikamuke.pdfIn PDF document text
    • https://mokowevabib.weebly.com/uploads/1/3/0/7/130739664/wudusubumozuvixuketo.pdfIn PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/jokifor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463263/normal_60299ba2aecd2.pdfIn PDF document text
    • https://xowanejizaki.weebly.com/uploads/1/3/1/8/131871556/7986317.pdfIn PDF document text
    • https://cdn.sqhk.co/sozovifena/pghbgiM/21381095914.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/zibeworuwafisa_bipogil_bovatokemuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_600cdf2a79165.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/tumasun/d_d_5ed_paladin_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/unreinforced_masonry_wall_design_spreadsheet.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_off00010d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D29 5424 bytes
SHA-256: bfdfd030c1221ad0e9c798971bfa262ccaec5e83547db7e08a447542957517bb
font_01_sfnt_off00011fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB0 10716 bytes
SHA-256: 53ddf42917115fe0cd10e65524ba9407654b53b34b31932317df9259c3cb4869

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