Malicious PDF — malware analysis report

Static analysis result for SHA-256 020d5ef8e37852be…

MALICIOUS

PDF

77.9 KB Created: 2021-03-28 10:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9e22d67da7e42ac1ce959e114fa5ade7 SHA-1: 53d15c52d33a6f572122681a184f4f3c177465f4 SHA-256: 020d5ef8e37852be7010f284c99671433f010135930d1e3a06002a3fb5cd6441
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

Heuristics 4

  • 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.
  • 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/award?keyword=the+sage+handbook+of+the+sociology+of+religion+pdf PDF link annotation
    • https://cdn.sqhk.co/fegojujor/bhcOsjg/forest_rescue_bubble_game.pdfIn PDF document text
    • https://cdn.sqhk.co/xogudililavo/rgcn5jj/the_pirate_caribbean_hunt_cheats_ipad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_60250b38144a4.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/gjdlgjd/biztalk_mapper_if_then_else.pdfIn PDF document text
    • https://cdn.sqhk.co/fotinegataso/tmhdYje/ibis_paint_x_icon_aesthetic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379489/normal_60150ad6abeeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465142/normal_5fde54da42ba3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470553/normal_603c2683d3eaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425917/normal_60567e3436db1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393925/normal_605a4190ca0bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448345/normal_5fff66649a820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448323/normal_605f7248afcaf.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/vidadaviwal/9624008300.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/ameritas_401k_distribution_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/replacing_thermal_fuse_on_speed_queen_dryer.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/65924832151.pdfIn PDF document text
    • https://564fd4a8-0e6d-4f97-813a-a14a70c45316.filesusr.com/ugd/f90d28_800bc9aae15a46fcaa08098e7f957085.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fikuvine/credit_reference_sheet_example.pdfIn PDF document text
    • https://c09438b0-f1cf-4ade-afa2-d322e048c450.filesusr.com/ugd/313cc6_2e3d30ab144140058f1854f63981a784.pdf?index=trueIn PDF document text
    • https://2aa0b900-127f-4603-a19a-6a731d3c9eb1.filesusr.com/ugd/5eaffa_371c51e0afc04020a3f13e4553dd83ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/certificate_of_participation_template_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/48061762143.pdfIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_e62f0bed010041fc911dffbdf4fc5f27.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/kineveruri.pdfIn PDF document text
    • https://3df016ad-b40f-424f-9918-b96c60f46212.filesusr.com/ugd/387bfe_ef080560a0fc42f1b1347419ace306a2.pdf?index=trueIn 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_off0000f3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AD 5672 bytes
SHA-256: 6e344f443f884ac0c460915eb765553d16fcec82aeca670ae1980a8df55093c1
font_01_sfnt_off000106f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F9 10576 bytes
SHA-256: e5a6a5dae6f98fb7da38eb2cecd0678efb1dfab73d8df8d74a9be50e65795932

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