Malicious PDF — malware analysis report

Static analysis result for SHA-256 34549ab92117b799…

MALICIOUS

PDF

112.8 KB Created: 2020-12-03 22:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5db486ea7d77dc2ca832de51b5e7074b SHA-1: 486bf1916257118f481737d69e2860ad83327818 SHA-256: 34549ab92117b7991acdcf130e87d38333aba3a73c4a7bd9dda317e8c7108788
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, appears to contain text related to a 'classic wow druid tank leveling guide', likely a lure to disguise the malicious intent of redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/aws?utm_term=classic+wow+druid+tank+leveling+guide PDF link annotation
    • https://mefogogid.weebly.com/uploads/1/3/4/6/134600117/zunomiwedo_nutiboxutav_wugufi_nefufazatofoja.pdfIn PDF document text
    • https://japilosibif.weebly.com/uploads/1/3/4/5/134578465/0e1dd2bdfa81.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/b94e1a.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/3373854.pdfIn PDF document text
    • https://somotudodij.weebly.com/uploads/1/3/4/6/134699902/sotisigatavesif.pdfIn PDF document text
    • https://puraxexi.weebly.com/uploads/1/3/4/7/134718411/foxizazegopokubamab.pdfIn PDF document text
    • https://sosufafa.weebly.com/uploads/1/3/4/8/134862430/wisesawuxoxamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f95d6d6f2f99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc283513dfdd95b60df5163/t/5fc679c408845d09246adb09/1606842821105/sotuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bce496a-7e23-464c-be1d-55642d2806a8/tomewujisekibub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/416df210-1c38-4573-bae6-b997a4109a73/fesaba.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E94 5228 bytes
SHA-256: ef2b4ca57bded72f133451227473707fbc042f97a7c6110b5ccdf1d6dce7184f
font_01_sfnt_off00019080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19080 11064 bytes
SHA-256: be698899940cd3af21e4f3db7516852a268349aa4b50419801120f8230cdb9e0

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