Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee6b2f6e947d594…

MALICIOUS

PDF

75.2 KB Created: 2021-04-19 12:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: be2652ba8849336176cb8469c8fa0628 SHA-1: 9b327f95e52df3fb75a3261a08e65602a1e4a4e1 SHA-256: 3ee6b2f6e947d5942dd1cb1f4086ced63b5155069a9c2aa1d6415dd7c9fb0534
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9996

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=f+reif+statistical+physics+free+pdf+download PDF link annotation
    • https://cdn.sqhk.co/wujozuzewed/3ibncM7/nematikona.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/41535177366.pdfIn PDF document text
    • https://cdn.sqhk.co/rokajoten/VnjgIgj/jemojotebasajopojuzugak.pdfIn PDF document text
    • https://cdn.sqhk.co/xidupesijij/GnhcDjc/funny_animations_movies.pdfIn PDF document text
    • https://kavosimodo.weebly.com/uploads/1/3/4/9/134901779/18b29.pdfIn PDF document text
    • http://toppiksnack.xyz/what_does_civil_process_papers_mean2f43y.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/2ABFxqq/80047721325.pdfIn PDF document text
    • https://gogovujogizog.weebly.com/uploads/1/3/1/6/131607278/bogubira_danuxote_wegikumagemuva_reviwupuweloze.pdfIn PDF document text
    • https://cdn.sqhk.co/zajagatetode/vghhcje/highway_rider_extreme_unblocked.pdfIn PDF document text
    • https://watumuguv.weebly.com/uploads/1/3/2/6/132695830/9245761.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/70728449078.pdfIn PDF document text
    • https://cdn.sqhk.co/dikozogub/iaLJicq/tamil_nursery_rhymes_songs_with_lyrics_and_action.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/MdxUWii/color_by_number_car_easy.pdfIn PDF document text
    • https://rujuzodojavumip.weebly.com/uploads/1/3/4/7/134726220/758d10d4aa85b29.pdfIn PDF document text
    • http://ttop-shop.com/nulumubafudowizitexonomenk5zy.pdfIn PDF document text
    • http://joriwolujuf.sportsontheweb.net/94263221995.pdfIn PDF document text
    • http://bobr.space/libro_el_arte_de_la_guerra_maquiaveloha2yz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e3f43f5-3702-4872-99f7-b63fde3fa7c7/13942617383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6c89ee7-2fb5-4a95-a668-66c79dd770e2/texususovokuvedib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42010003-1fbb-48be-b491-adcbd3c1be24/lost_girl_tv_series_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5956fb77-ee93-451f-897c-302036989016/dyson_-_ball_animal_upright_vacuum_-_iron_purple_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a8d81a0-9909-47b8-b707-ea7f7f0af7e9/router_d_link_dir_825_ee_ac1200_configuration.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_off0000e6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A9 5392 bytes
SHA-256: f60d35eb8bef9f3327c95086cb8bcf3d52f760ff2b30333f7556ea7fdba96400
font_01_sfnt_off0000f916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF916 11388 bytes
SHA-256: 1e5a9caff707bd8cfd67a77daf03edce1d0c91ac933bcb2c8229a6172225582a