Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b3d6ce3af1ea82…

MALICIOUS

PDF

125.5 KB Created: 2021-03-29 08:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: fc78d229826997c0465a25fbce7a02dc SHA-1: 082c03d9518057bc0ab4682d5a6545a278b6c9b5 SHA-256: 56b3d6ce3af1ea8282004590637034ea10d1350883f33b2b33f8421d4eae4b75
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing or trojan. The presence of numerous external links suggests a potential distribution vector for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/award?keyword=alejandro+jodorowsky+psicomagia+pdf PDF link annotation
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/texugudimavani.pdfIn PDF document text
    • http://mamajan.space/70246424961nvmkp.pdfIn PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/802b9098f.pdfIn PDF document text
    • http://foyou.store/equest_pramox_pas_cher3fj8d.pdfIn PDF document text
    • https://kakituku.weebly.com/uploads/1/3/4/5/134589995/1521de8a.pdfIn PDF document text
    • https://rijojuno.weebly.com/uploads/1/3/5/3/135310883/99dab366b7edf.pdfIn PDF document text
    • https://zobezefifoluza.weebly.com/uploads/1/3/5/3/135306737/8787015.pdfIn PDF document text
    • http://extra-fon.ru/risekomibakakejovegulonu2kabn.pdfIn PDF document text
    • http://italy50wow.pro/lulowazupixovetezatewuog0ay.pdfIn PDF document text
    • http://flathead.us/giwovofegiwodogosisikmt1ac.pdfIn PDF document text
    • https://zetaxufonepijak.weebly.com/uploads/1/3/4/3/134353616/salapowipawo.pdfIn PDF document text
    • http://naturalm.space/xuzebevuvelaroxefivj9wws.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/what_are_the_best_automatic_vacuums3imcv.pdfIn PDF document text
    • http://smartcreditcheck.info/comptine_dun_autre_t_piano_notesrqvux.pdfIn PDF document text
    • https://zibekasosux.weebly.com/uploads/1/3/4/0/134040395/4c89ab4c42d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/09bcd71a-397d-47ba-a1f1-1bb5cfcddc18/15553706153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbcbcc9e-1091-4ddf-bf6f-95070f38d505/cyberpunk_2077_ps4_refund_email.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d84ddc-7236-4176-973e-b73e2df52927/old_school_rap_songs_with_good_bass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c299e61-e91a-4b22-a427-63bf9210e2eb/how_to_check_codes_on_2014_jeep_wrangler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d011d600-f4f8-47f9-bd29-4439315c3500/30656561779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7909c74-ea5f-4bfc-87ee-d2ce1df6fdf3/61957185165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b7b7137-e9dc-4ee4-9897-cf78356d2235/how_does_a_community_organizer_get_paid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d73a709-4709-4abd-9dd2-b93dcdb25e1d/lodogaxuvigejogovutovulug.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BC7 5504 bytes
SHA-256: c1dc7b3f6ae5f925dae79d2e120512b9d7a98445688d27e3b0360bfbbb764577
font_01_sfnt_off0001ae83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE83 13724 bytes
SHA-256: d99c3a522517688abde90a04c6bc6a1dcf0e0fa3fc5d9380ec7ab7453bc03ce4
font_02_sfnt_off0001db02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB02 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361