Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abba904c9462f60…

MALICIOUS

PDF

101.2 KB Created: 2021-03-22 21:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9ce77db6953d44515816523160056279 SHA-1: 15ecda34e327f69cc03ad152c5414327fe5dba60 SHA-256: 8abba904c9462f60965d90294b8acab831fe54edd60dd83a086deebb6a3d5678
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external links to potentially malicious or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=best+olympus+om+lenses PDF link annotation
    • https://cdn.sqhk.co/kivipemo/gciihgY/luzelak.pdfIn PDF document text
    • https://vejamepune.weebly.com/uploads/1/3/0/7/130776484/nodobevib.pdfIn PDF document text
    • https://dunewalowipeli.weebly.com/uploads/1/3/1/8/131856746/tepipo.pdfIn PDF document text
    • https://cdn.sqhk.co/nepodowu/srgdjjS/jellyfish_pet_price_skyblock.pdfIn PDF document text
    • https://feposogasutam.weebly.com/uploads/1/3/1/3/131384530/jirufetazeze-xetupetiwe-dodis-lalibemuda.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/hExiiIj/revheadz_engine_sounds_full_apk_download_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446382/normal_5fe4fc65a7995.pdfIn PDF document text
    • https://cdn.sqhk.co/ledusefugize/ieYUEhd/76861111476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476002/normal_6057194f0c95b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493917/normal_60077d0c53e7c.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/Uhfxhie/dj_mixer_app_pro_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450156/normal_602e71a5b5f94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491175/normal_60038dd788d19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_6048078c4f90e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/cheltenham_festival_guide_2019_book.pdfIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_0e2153f2498f4233a9d91d68f506fd5d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/debt_compromise_agreement_template.pdfIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_b23d8cdfbc654f3d89823538bc64ff4b.pdf?index=trueIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_324a01d816df4de292fd2a15ec092fff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/brusa_charger_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/anonymous_chat_no_login_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/wugogireraxelulapexi.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_off000150f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150F7 4808 bytes
SHA-256: a7bf3af4c97ad9b9ac53594b061fc9164e980d26fdeee534a41dbe16eb5be1ee
font_01_sfnt_off00016151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16151 11332 bytes
SHA-256: 541c428ef8cf214be21f52dc84a0a4e886e95fd89cc578aabf82d0b57a8da6d6