Malicious PDF — malware analysis report

Static analysis result for SHA-256 20688b10b10085aa…

MALICIOUS

PDF

80.7 KB Created: 2021-06-11 04:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5558248dc61f5cc282d9e25dc4ff8560 SHA-1: b457ae854ae59f5385f6b6d30a74a801a9bfc747 SHA-256: 20688b10b10085aa21a793fba264749be63ca0536714d012762a9208adb7dd3b
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious and functions as a link farm, directing users to numerous external websites. The document body, though heavily obfuscated, suggests a lure related to 'Yowhatsapp by fouad mokdad'. The presence of many external links, some on disposable hosting, indicates a probable phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/pbw?utm_term=yowhatsapp+by+fouad+mokdad PDF link annotation
    • https://dorenezawux.weebly.com/uploads/1/3/5/3/135383086/5c1d5a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382421/normal_6008953303b2f.pdfIn PDF document text
    • https://ruxibero.weebly.com/uploads/1/3/4/4/134403554/fubirem_wutixegurezol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407062/normal_6017238daf73a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_6054bc0635b84.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/2764624.pdfIn PDF document text
    • https://zejaxosadakawur.weebly.com/uploads/1/3/4/3/134372542/4223212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427274/normal_60bef0cfca762.pdfIn PDF document text
    • https://bediwejuze.weebly.com/uploads/1/3/4/8/134899819/favoporu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489835/normal_5ff50738a9c8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369915/normal_60648a248c2ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446027/normal_5fe641773c9fa.pdfIn PDF document text
    • https://samarobiratepiw.weebly.com/uploads/1/3/5/3/135327643/rekiterowepozef_jadawefebesi_fanirulu.pdfIn PDF document text
    • https://nowuvufeguxebib.weebly.com/uploads/1/3/2/8/132814980/fudizedakejeviwiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456687/normal_600e45d5c19f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406456/normal_605cc99fca250.pdfIn PDF document text
    • https://fojefutitamok.weebly.com/uploads/1/3/3/9/133989463/jadogosazetok.pdfIn PDF document text
    • https://juzowugaf.weebly.com/uploads/1/3/4/7/134773334/2691626.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tirotibixup.pbworks.com/w/file/fetch/145089840/jimejamajopetozelabukov.pdfIn PDF document text
    • http://sowenux.pbworks.com/w/file/fetch/144548085/magaloveloluvefi.pdfIn PDF document text
    • http://togusan.pbworks.com/f/dragon_city_free_gems.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/cuantos_ejes_de_simetria_tiene_triangulo.pdfIn PDF document text
    • http://biselafibe.pbworks.com/f/33500684583.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_off0000f958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF958 5512 bytes
SHA-256: 7f7b5c9d65827d019d6f0ca948e947c01082f9e46ee68e809650cc24e64726bd
font_01_sfnt_off00010c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0B 12432 bytes
SHA-256: ed884b57f4d47f77e5e44789202738eeb0b7bcd02d6d95082da4af268a44f0e8