Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf06d100ad20843…

MALICIOUS

PDF

86.6 KB Created: 2021-03-14 01:33:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 72b9e82c830828de66d52d75c8d9ffe4 SHA-1: d241b4357355f9238ee6fa8eb991ef458539d72b SHA-256: 1bf06d100ad208437d5856987bcb7950dd24f9793e73d47bf3b5722be9c1d432
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://jacksth.ru/wix?keyword=dinoco+gas+station+near+me PDF link annotation
    • https://bateworolod.weebly.com/uploads/1/3/4/3/134315912/2c8f89f7fa7.pdfIn PDF document text
    • https://pakimisubimoge.weebly.com/uploads/1/3/0/7/130776027/9663c124379cd84.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/zufuzivapipaselibim.pdfIn PDF document text
    • https://muxetomanudone.weebly.com/uploads/1/3/1/4/131406273/rojagunifir.pdfIn PDF document text
    • https://mutikotamibe.weebly.com/uploads/1/3/0/8/130874320/malinas-jegovetepifat.pdfIn PDF document text
    • https://tuvaxijilitug.weebly.com/uploads/1/3/4/6/134668501/rapowafem_pawami.pdfIn PDF document text
    • https://wujojebexubab.weebly.com/uploads/1/3/1/3/131380870/9584822.pdfIn PDF document text
    • https://xuwogufovesuvem.weebly.com/uploads/1/3/1/4/131406895/jafowud.pdfIn PDF document text
    • http://my-credit.info/warhammer_40k_armageddon_guideozv9z.pdfIn PDF document text
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/619e86bd1cf.pdfIn PDF document text
    • https://digexuvin.weebly.com/uploads/1/3/2/8/132814990/7551049.pdfIn PDF document text
    • https://larigagip.weebly.com/uploads/1/3/4/8/134887586/1543471.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/barebovepu.pdfIn PDF document text
    • http://palitra-cveta.ru/57189752554efsf4.pdfIn PDF document text
    • https://nibapexi.weebly.com/uploads/1/3/0/9/130969889/pakekewazavala.pdfIn PDF document text
    • https://mamijaba.weebly.com/uploads/1/3/4/6/134634293/78cb61475.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/RVgdhaj/the_solar_system_planets_from_smallest_to_largest.pdfIn PDF document text
    • https://popupobapovuzus.weebly.com/uploads/1/3/4/0/134012290/7094938.pdfIn PDF document text
    • http://3203epworthcres.com/english_lessons_beginnersptr4y.pdfIn PDF document text
    • http://drnextact.xyz/kuvurebuwimowavodilijososte7h.pdfIn PDF document text
    • http://supsun-aero.com/hp_officejet_4500_all-in-one_printer_-_g510g_manualjifk9.pdfIn PDF document text
    • https://jirogadipew.weebly.com/uploads/1/3/1/6/131606393/2f35051b44d.pdfIn PDF document text
    • https://numurivigafezu.weebly.com/uploads/1/3/4/3/134390613/0d56329d10d.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/2015ac0c677f3.pdfIn PDF document text
    • https://reluxepeguru.weebly.com/uploads/1/3/4/3/134363030/6906175.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/hbXidA1/zizawifavije.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00011501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11501 5088 bytes
SHA-256: 727f055187ef2690966b20924747f9c4c03c34e6eb4ac798e7d99c619303fa56
font_01_sfnt_off00012643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12643 11148 bytes
SHA-256: f82034973c280819146d80bddaa457801f92cdb65cda2a8c3010a9fd519a90de

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