Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bfc7abc246a9339…

MALICIOUS

PDF

73.1 KB Created: 2021-03-28 20:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 66380c6a47e143d2419017cd0d337042 SHA-1: 7e6e7d2fa3b55d71ca32c3ce9f4744fb4af49189 SHA-256: 9bfc7abc246a9339ecfa24539475b7f4878e1333bb847063dadaa5d7c782a845
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and is flagged by heuristics as a link farm. The embedded URLs suggest a phishing or SEO-based lure, aiming to redirect users to potentially malicious content. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan distribution vehicle.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/wix?keyword=american+government+chapter+5+section+1+assessment+answers PDF link annotation
    • https://cdn.sqhk.co/banifiga/dWgiLgg/can_notepad_compare_folders.pdfIn PDF document text
    • http://wowitaly.space/emathinstruction_geometry_answer_key_freeqqa53.pdfIn PDF document text
    • https://cdn.sqhk.co/mowezeto/vHWPjci/space_fighter_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/xidizizo/jahcWYh/basketball_wallpaper_hd.pdfIn PDF document text
    • http://appletopshop.ru/80960689053g5zzx.pdfIn PDF document text
    • http://forpost-electrica.ru/48174111446fl4n2.pdfIn PDF document text
    • http://zoompol.xyz/wakuxonijamoxavatiwosexak78vd9.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/y1heThd/3d_archery_tournaments_in_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/jdiezhc/gagapesovitepimabade.pdfIn PDF document text
    • https://fokikemapusa.weebly.com/uploads/1/3/1/3/131398543/nulomukota.pdfIn PDF document text
    • http://goldotzyv.ru/qualitative_and_quantitative_research_method_examplesgh5c8.pdfIn PDF document text
    • https://nurinakeviwiket.weebly.com/uploads/1/3/1/4/131407921/ad6802.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/f5ef35a8-f0c8-44dd-aaf1-cd795769da84/59062030951.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/meburubidomobibi.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/rejegusurulil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e42e6f0-fa0a-4d27-b3e4-db90b6da5ea1/sopabas.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/niwituz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95cee032-0a3f-410a-b537-816eb5918ef2/56167601889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85d7401d-bf46-4040-8623-060630c58e2b/what_causes_sloppy_handwriting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5edec5f-9426-4ce4-b55f-8ace88cb97b9/rafuvofafufafujogowoseb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c769b105-6edf-4322-be86-0e1cf35b68b4/motion_light_stays_on_when_cold.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7a319ec-dbc7-4b0b-9d2f-4ae7c845e1c7/evenflo_car_seat_installation_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ac8f7d-5b85-4bed-992f-8e73c1d524b9/sufiwajugazaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf1bc1c-df42-4b7e-bd45-ed8195723d3b/71047936459.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_off0000e00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00D 5632 bytes
SHA-256: 60082e80fd7254b29fd21763dc6a77a94f6fc8c1e24f407c5afbc2858c39d4ea
font_01_sfnt_off0000f32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32D 10368 bytes
SHA-256: 2a988a6d02b7b97a77414ca7883a72d7d62ceb3b80b3dd5b41416780fcfc00b2