Malicious PDF — malware analysis report

Static analysis result for SHA-256 497fa1b5cd277410…

MALICIOUS

PDF

72.6 KB Created: 2021-03-23 20:30:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5b6b096c171a4a302e7c9be5c76a3f78 SHA-1: 3c02564a2f795cd192921f720d12db6353313485 SHA-256: 497fa1b5cd2774109e88668c97b1c0147653a48fa5aee9dbd203ca15461a1273
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 and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many pointing to disposable hosting and configured as a link farm, strongly suggests a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/award?keyword=cessna+citation+mustang+poh+pdf PDF link annotation
    • http://raxejudesezix.scienceontheweb.net/ropefefexividanujuxagoju.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/6jgifJg/72924648174.pdfIn PDF document text
    • http://aazzzry.space/973296512987j66l.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/BhhigPR/81017128837.pdfIn PDF document text
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/fafff1f456.pdfIn PDF document text
    • https://lotopunukulel.weebly.com/uploads/1/3/4/4/134473418/1952524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459936/normal_604b6f8930d2b.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/17188019808.pdfIn PDF document text
    • http://fulifubajamo.mywebcommunity.org/canada_study_visa_form.pdfIn PDF document text
    • http://woodlesenka.ru/74554205062rpvr.pdfIn PDF document text
    • http://saniwigudovo.scienceontheweb.net/glossary_of_hrm_terms.pdfIn PDF document text
    • http://fitatuvepejozo.sportsontheweb.net/cardiorenal_syndrome_review.pdfIn PDF document text
    • http://relax35.ru/1258690199428hnl.pdfIn PDF document text
    • https://walanugenaxoduf.weebly.com/uploads/1/3/5/9/135964425/lumolipafukavatuj.pdfIn PDF document text
    • https://zutomivopisi.weebly.com/uploads/1/3/6/0/136051870/9686d6fb.pdfIn PDF document text
    • https://cdn.sqhk.co/balatexoriv/aEPQ9Eg/descargar_empire_war_age_of_heroes_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421477/normal_5fe8b7c379f5d.pdfIn PDF document text
    • https://cdn.sqhk.co/jivomawufem/hgngdig/thimbleweed_park_switch_physical_ebay.pdfIn PDF document text
    • https://fuxiwajusefu.weebly.com/uploads/1/3/4/6/134617271/divov.pdfIn PDF document text
    • http://becloud.website/will_there_be_more_twilight_books_after_midnight_sund60cw.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://s3.amazonaws.com/jiwisi/borderlands_2_siren_skill_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/what_does_student_engagement_look_like_in_the_classroom.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_off0000cff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF1 5348 bytes
SHA-256: ad0d573ca3fffd2105a333d5f6ee4cb50ec7ca4566150da95ec31b5c0ab0ce9d
font_01_sfnt_off0000e1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FA 10444 bytes
SHA-256: 98f7611e6d3e0c8a93c1282ef3eb332ae18856ec780dc76aed048d91e9aa572f
font_02_sfnt_off00010558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10558 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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