Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3c6a9986a416be…

MALICIOUS

PDF

77.8 KB Created: 2021-03-31 17:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f2046cb4c59aaffd2a15b7302194e7dc SHA-1: 9077d49ddd22d67996df364327c93736f8389930 SHA-256: 6e3c6a9986a416be6c807e810bcdf90e4d2273d9777400650a143c1d571a6204
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 0.9991

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://druttle.ru/wix?keyword=what+are+google+ads PDF link annotation
    • https://lomewulepizava.weebly.com/uploads/1/3/3/9/133999744/noduzozerawugosan.pdfIn PDF document text
    • http://xivobivivupe.mygamesonline.org/diverter_valve_kit_for_jandy_neverlube_valve_4720_replacement_kit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_601a2b5041aa1.pdfIn PDF document text
    • http://raxewapikeb.mygamesonline.org/adolescent_anxiety_screening_tool.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/c5LLu2M/billie_eilish_bury_a_friend_lyrics_german.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/hjie3ig/toca_life_vacation_apk.pdfIn PDF document text
    • http://gasurorir.sportsontheweb.net/dolipek.pdfIn PDF document text
    • https://matiposokatogu.weebly.com/uploads/1/3/0/7/130739068/wazadefazar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_604463c1d8f3d.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/hggjdMg/dilovoliwudukugimumizi.pdfIn PDF document text
    • https://febufovita.weebly.com/uploads/1/3/4/3/134324671/fezojujonivuj.pdfIn PDF document text
    • https://cdn.sqhk.co/jijasitov/i8qhg4T/wotesug.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/rjgjedw/mp3_player_music_player_equalizer_bass_booster_eq.pdfIn PDF document text
    • https://ziwagugo.weebly.com/uploads/1/3/4/1/134131511/1432968.pdfIn PDF document text
    • https://cdn.sqhk.co/faroziwe/euRiigj/80936034670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449602/normal_5fd2745d15a6a.pdfIn PDF document text
    • http://fipagolanikobax.mygamesonline.org/que_es_preeclampsia.pdfIn PDF document text
    • https://kitigenuripoduj.weebly.com/uploads/1/3/1/0/131070171/4693161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490974/normal_603f2adf00cbb.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/hcjesha/beregifuruketunudoxixi.pdfIn PDF document text
    • https://cdn.sqhk.co/kefivaxepaj/chgjhiC/screen_recorder_for_win_10_free_download.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/latufenaw/zevubawe.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/gopuwujegamovoweb.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/fresher_mechanical_design_engineer_jobs_in_navi_mumbai.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/nixaxogegovaso.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_off0000f40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40A 5100 bytes
SHA-256: a63e1eaa63c2514617db144eaaaa087dccd12bfc64d7bf603255eab497aeb0bc
font_01_sfnt_off00010562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10562 10636 bytes
SHA-256: b0e3eaaa90b6a0a4a40d62d7193c684a1e19cc35a416d8fdc388030a8f22c43f