Malicious PDF — malware analysis report

Static analysis result for SHA-256 8752d270f81874ce…

MALICIOUS

PDF

78.6 KB Created: 2021-03-16 17:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3b2957787cdea18be21caaaf639c1370 SHA-1: 53a363f2b709cb2f37305c30c376896572fb202c SHA-256: 8752d270f81874ce6d630d84be61c56398b251e8620e84bf8c10ee72bc669971
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 0.9997

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://lozipotod.ru/wix?keyword=percent+by+mass+problems+with+answers PDF link annotation
    • http://jinobuzid.scienceontheweb.net/ethical_considerations_in_marketing_research.pdfIn PDF document text
    • https://kivisibef.weebly.com/uploads/1/3/0/7/130775328/vozarufax_bagutifogewa_mumunax_zawolupuxiki.pdfIn PDF document text
    • https://cdn.sqhk.co/xumefugafa/dhcIQjf/tippy_tippy_toe.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/g6Jjhif/13955977878.pdfIn PDF document text
    • http://juzufezike.mygamesonline.org/classification_of_baking_tools_and_equipment.pdfIn PDF document text
    • https://xutorobufazam.weebly.com/uploads/1/3/5/3/135345650/a98bda920a7d7d.pdfIn PDF document text
    • https://benokonafininu.weebly.com/uploads/1/3/4/6/134606635/donoxuposi_xuwukopajibuv_falef.pdfIn PDF document text
    • https://xabejelowubi.weebly.com/uploads/1/3/2/6/132695530/pejibav.pdfIn PDF document text
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/3252459.pdfIn PDF document text
    • https://cdn.sqhk.co/sibuborepato/FYrgcih/production_support_interview_questions_and_answers.pdfIn PDF document text
    • http://lefibipefazefep.mypressonline.com/11347096859.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/nopaziwidapepu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wonanikapudidak.atwebpages.com/dijezagunon.pdfIn PDF document text
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_e19d421afae44c959161dfa56f3d4522.pdf?index=trueIn PDF document text
    • http://kosuvoz.epizy.com/one_punch_man_season_3_episode_13_release_date.pdfIn PDF document text
    • http://bodudubabafixe.rf.gd/tusawuv.pdfIn PDF document text
    • http://solatilexi.epizy.com/sample_cookie_policy_template.pdfIn PDF document text
    • http://ledaruwevegoxu.onlinewebshop.net/manual_autocad_3d_2020_espaol.pdfIn PDF document text
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_f10573398ea7444b8cf905e6779c4026.pdf?index=trueIn PDF document text
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_17073cdf556c4fa3b633bf97ca2e34ee.pdf?index=trueIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_55b23689709b42d09ed7be1d0d7b72f1.pdf?index=trueIn PDF document text
    • http://viwuleraxukopiz.epizy.com/black_desert_online_xbox_one.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_off0000f1dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DD 5508 bytes
SHA-256: 89861c0ed2484519b18d48765228d42a11f95b06edacc90db905b3bdd2d54fc6
font_01_sfnt_off0001047a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047A 11312 bytes
SHA-256: 952fa1b7b2a7f9ccb368c9c25f09127dbbe2b56745abccc69693f56db7b6d679