Malicious PDF — malware analysis report

Static analysis result for SHA-256 41bb70bc0b12def2…

MALICIOUS

PDF

76.9 KB Created: 2021-03-23 06:16:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 01f53dd023a3e8f68b9ffa8f8fa568b7 SHA-1: bda96bd81ea45d9258d26ea92da802cae889959a SHA-256: 41bb70bc0b12def2f4c8055d144e8d22c2affbfc5a61062d59ed0c274a54493e
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9997

Heuristics 4

  • 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://jottigo.ru/wix?keyword=run+2+unblocked+games+66+at+school PDF link annotation
    • https://cdn.sqhk.co/jigitovewuk/jjPlAib/meaning_of_spectacle_in_urdu_and_english.pdfIn PDF document text
    • https://cdn.sqhk.co/pudamunipum/hHigSgg/35063755514.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/9DfjiZd/kesimexofaputo.pdfIn PDF document text
    • http://tricitysikhs.com/togujabezatemugapojukvfob4.pdfIn PDF document text
    • http://manthoughtswebsite.website/wheres_waldo_scary_bookm12vg.pdfIn PDF document text
    • http://helpforteam.com/brother_mfc_495cw_print_black_onlydpm8w.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/aibJTic/74985681494.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/W5FdvBM/fifa_world_cup_qatar_2022_groups.pdfIn PDF document text
    • http://gukibipujuregof.22web.org/22738804085.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Gijjhq7/vepoxonojimugapotap.pdfIn PDF document text
    • https://cdn.sqhk.co/tigoxexuda/hfsgfge/sloth_definition_sin.pdfIn PDF document text
    • http://premium-cinema.com/fazitedorakagimafatidetenzvxg2.pdfIn PDF document text
    • http://zalavovira.22web.org/how_to_be_a_christian_mentor_for_the_youth.pdfIn PDF document text
    • http://net-klientov.ru/what_jobs_can_i_get_with_a_business_communications_degreexy3lk.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://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_f52fb368deea45689b8ee1dffc26159f.pdf?index=trueIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_f9bdce0b873143bf9b873cf9c2ec99ce.pdf?index=trueIn PDF document text
    • http://barivigafijamub.epizy.com/34132058690.pdfIn PDF document text
    • http://sitasuwa.epizy.com/libokejogedajelasize.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_1e37f7f5f7d54c4fbac496a09974b6e7.pdf?index=trueIn PDF document text
    • http://pibuluxe.rf.gd/pestel_analysis_of_unilever.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_off0000e20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20B 5588 bytes
SHA-256: 826ae1ea4317470faa414aca219329c09dccda2d8b9e0db8ff50c4e368eede56
font_01_sfnt_off0000f4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E5 10328 bytes
SHA-256: a23bb295c3b1293d7fd7d6cbdd10c93c6604d297edd5635e8e44b4a97280ace3
font_02_sfnt_off00011845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11845 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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