Malicious PDF — malware analysis report

Static analysis result for SHA-256 f555492ca6a388b5…

MALICIOUS

PDF

109.0 KB Created: 2020-12-22 15:36:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 65ecbefc1b3f69ce96f5fb593d75e102 SHA-1: c1c794e3bdf9e997558be65ab60a02012d2abe24 SHA-256: f555492ca6a388b57c962ccb8cfa56c45850947e830af32e72dd983c8ad2beeb
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document is identified as malicious by multiple heuristics, including ML classification and ClamAV detection, and is specifically flagged for brand-impersonation credential phishing. It contains a large number of external links, many hosted on disposable domains, which likely lead to phishing pages. The document's content, though partially garbled, suggests a lure related to 'Luffy vs naruto vs goku', possibly to distract from the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://napujokid.weebly.com/uploads/1/3/5/3/135339673/wonenebo_mosaweri_bexafumamot.pdf.
  • 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/123?utm_term=luffy+vs+naruto+vs+goku PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409621/normal_5fc55005601de.pdfIn PDF document text
    • https://napujokid.weebly.com/uploads/1/3/5/3/135339673/wonenebo_mosaweri_bexafumamot.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/zupejomazegizonik.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/53f3b461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419846/normal_5fd8a2de35405.pdfIn PDF document text
    • https://mudagetani.weebly.com/uploads/1/3/4/3/134381332/7828573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5f87e0c140db1.pdfIn PDF document text
    • https://tufanemoxidubux.weebly.com/uploads/1/3/4/3/134315727/mezusiselazeri_zirebupeki_wopipubexigi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384160/normal_5fa106ffa63a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_5fadf645ecbdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f977aa48d899.pdfIn PDF document text
    • https://wunawewob.weebly.com/uploads/1/3/0/7/130775592/32d529e.pdfIn PDF document text
    • https://zuduwejigorim.weebly.com/uploads/1/3/5/3/135329148/1f396a27cbc4c42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5fa30be6e8b3e.pdfIn PDF document text
    • https://xalojuxovev.weebly.com/uploads/1/3/0/7/130774978/499b5.pdfIn PDF document text
    • https://wubinuju.weebly.com/uploads/1/3/4/6/134642725/72b3533e64b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/042c0e2a-ae0e-4075-8ff2-4644afcf90e0/wevisoninuxoluxulup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA9 4784 bytes
SHA-256: b2254105bc2e0b88c5e94e35a7932b78c1a9b74fe2190e7001d7bd378f437331
font_01_sfnt_off00016d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D02 13684 bytes
SHA-256: e7a2e5149df7c860cf0f938aa6faa104b2cc25b1015dacf307570837bab323fa
font_02_sfnt_off000198a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198A0 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3