Malicious PDF — malware analysis report

Static analysis result for SHA-256 941bb9e953fbd911…

MALICIOUS

PDF

45.8 KB Created: 2020-10-28 15:04:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 05bfa1794d5edbfd22b92f6815691c22 SHA-1: 76a7b9bd0fd840fe8bc9a2a174f762ac83199339 SHA-256: 941bb9e953fbd911cd04b768ae8c174263972bc8f2cc1528fc2b097f3707bbf0
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://cctraff.ru/pify?keyword=cpcc+levine+campus+financial+aid+office In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f9248863a73d.pdfIn PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/vomakobav_vamatapenavekik_mipukivof.pdfIn PDF document text
    • https://zadujemerumid.weebly.com/uploads/1/3/2/6/132695269/suluriteligalimatus.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/besosuror.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f8f537692354.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/945910647a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_5f8f6b7bf2d01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f8b274678f00.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/kegasitapakipuxa.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/mukobuf.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/1713188.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/wizidimawag/konsep_dasar_akuntansi_syariah.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/bugepejatarerutipenavor.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/kobalofid.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/ispad_clinical_practice_consensus_guidelines_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/maguzizogesijalinelogov.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/beatboxing_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/cessna_210_parts_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/counselling_skills_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/patriarchy_in_african_culture.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/homestuck_god_tier_quiz_tumblr.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/writing_task_1_general_ielts.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/guzikiwumonilujesanoladek.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/canon_powershot_sx50_hs_manual_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/endgame_full_movie_online_free_reddit.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_off0000734d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x734D 5172 bytes
SHA-256: 94ef3e3ae777238ac48c40216ee3627ae3b15cbe78eedb7116ecf2c9ec92c601
font_01_sfnt_off000084db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84DB 10976 bytes
SHA-256: fc601055b8ae3b7c980ab18b113302e765f0780e61c6f28c7815f7d479c1a3b9