Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf6317afb88e566…

MALICIOUS

PDF

81.6 KB Created: 2021-03-06 01:51:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4ad26ca5dcacf021d8876dab6c7d4326 SHA-1: 97f71d4fded7c93804f3714dc104ef65da31ec25 SHA-256: ddf6317afb88e566121b7a852918d5454e2536b96c1a1717fa0551e7e9dd3a77
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of multiple suspicious URLs and the overall detection profile point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://zajinet.ru/strik?utm_term=historia+de+los+derechos+humanos+en+mexico+pdf PDF link annotation
    • http://wutopezogegusi.getenjoyment.net/shadow_monk_rogue_multiclass_5e.pdfIn PDF document text
    • http://wujejejifi.mygamesonline.org/vexusogijudepogorurolitu.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/71330705597.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380072/normal_5fe16d05e531b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462732/normal_601844312532a.pdfIn PDF document text
    • http://pevetune.66ghz.com/top_bollywood_songs_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374715/normal_5fc6762e48aee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375890/normal_5ffb89452cfcb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7e70056c-c2aa-4e53-98c5-50750123c107.filesusr.com/ugd/f8ae5d_f0fef305ee4747fb90fbccba7721b502.pdf?index=trueIn PDF document text
    • http://loluwoje.epizy.com/8424892929.pdfIn PDF document text
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_0a9ed2f87fb74df1868cd9e3758cf3af.pdf?index=trueIn PDF document text
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_1d9450cac4e64cf59a1efe1932d35a0b.pdf?index=trueIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_cbe943cfd22341cfacf956161fe63191.pdf?index=trueIn PDF document text
    • https://a765b249-d442-4b07-8ea9-8318d996b894.filesusr.com/ugd/902d29_838da81957474c7aa4c3d049b8db1275.pdf?index=trueIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_e35cc955783b4aabb496371ddccfc3d4.pdf?index=trueIn PDF document text
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_fdc6d34222fc4ab4b7d2fab37bb4d12f.pdf?index=trueIn 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_off0000ff00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 5424 bytes
SHA-256: 07a6b2337662be267dd792f9ac00bd696a0462dfb26dd575da855af7236d5450
font_01_sfnt_off00011146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11146 11656 bytes
SHA-256: e4b60ae257946a577b6018c380e644c20f09e7aa1630e57eaf09979640bc48e8

Open this report in the interactive analyzer, or submit your own file for analysis.