Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d1a67eece55a0c…

MALICIOUS

PDF

79.9 KB Created: 2021-05-28 01:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b1d3c002f8619c3007d47c5ffa2c5223 SHA-1: 01bc40ba3e2d1327e762f7d5baba5abd87b69560 SHA-256: 64d1a67eece55a0c6202b262f642305c8864cf4a765f2bc62df6f4e9f40c474d
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a link farm, with the primary URL suggesting a lure for software installation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=anonytun+setup+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5fdb607b8a573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501029/normal_605f2c25b177c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_60570c014d93b.pdfIn PDF document text
    • https://pezufefak.weebly.com/uploads/1/3/4/8/134865979/noneziweravatonil.pdfIn PDF document text
    • https://wuzinetasinozud.weebly.com/uploads/1/3/1/6/131606123/5851842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501356/normal_6043b1cc876cc.pdfIn PDF document text
    • https://xinogibujijinak.weebly.com/uploads/1/3/4/2/134235465/lutigaliko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_6038ec3f72a20.pdfIn PDF document text
    • https://diminulagiv.weebly.com/uploads/1/3/4/4/134489960/6288102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490920/normal_605bb3c5a4415.pdfIn PDF document text
    • https://fadukopita.weebly.com/uploads/1/3/1/8/131856205/xiwaduregufuxa.pdfIn PDF document text
    • https://doxagazezuzizum.weebly.com/uploads/1/3/1/6/131606815/puvozebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488556/normal_5fe6441448678.pdfIn PDF document text
    • https://joxeluduxena.weebly.com/uploads/1/3/4/7/134772203/ae75d7e683.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411923/normal_6008ac7ea4042.pdfIn PDF document text
    • https://sorudexene.weebly.com/uploads/1/3/1/3/131384015/dujewil_wedagagajisu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_6048598a2f138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428342/normal_60143fea4b6c4.pdfIn PDF document text
    • https://panodetis.weebly.com/uploads/1/3/4/6/134669877/3c75bf8e.pdfIn PDF document text
    • https://gowewibejeji.weebly.com/uploads/1/3/4/4/134481286/sadubomo-neruzupowa-marix-lijeziv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449629/normal_6044af4aed596.pdfIn PDF document text
    • https://kewalagaxed.weebly.com/uploads/1/3/4/8/134864879/kuzagajet_kivonenaseruzaf_pawiwuxipuzid.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
    • 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_off0000ee37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 4692 bytes
SHA-256: e40b38c1c1a71009c2b5a8a4a8b0d453d41b8cd671f1ad05800e9b79bed17150
font_01_sfnt_off0000fe46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE46 11304 bytes
SHA-256: 46d94fe999c5792dd9393c942a1a3e4ece5610df0536885f587338585c149001
font_02_sfnt_off0001248c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333