Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab233cb29f9589e…

MALICIOUS

PDF

90.6 KB Created: 2021-03-20 04:31:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d14a8c48d66c5845a88518aaa44d9bb7 SHA-1: 9f6aa7442eddc37241889437a879e8dac73a8e4a SHA-256: bab233cb29f9589e830dcdaa9b1c33f3da7427fcb63e01aafd15ce69e5e25e50
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 0.9996

Heuristics 5

  • 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 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://jacksth.ru/award?keyword=auditorium+lighting+pdf PDF link annotation
    • http://test123test.xyz/9157404088cmm1z.pdfIn PDF document text
    • http://characduwe.space/dragon_prince_elf_name_generator8ka1d.pdfIn PDF document text
    • http://ogranicbio.space/14052029849jgqe6.pdfIn PDF document text
    • http://badgesverified.com/commercial_cool_air_conditioner_12000_btu_manualex40c.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/oculus_quest_adb_drivers3l4cu.pdfIn PDF document text
    • http://tohld.in/pronoun_worksheets_grade_4gafg2.pdfIn PDF document text
    • http://rutefozur.22web.org/67878762751.pdfIn PDF document text
    • http://sdek-24.cc/boulangerie_patisserie_owners694sv.pdfIn PDF document text
    • http://idealsit.fun/air_force_one_is_down_movie_casthgwpp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zurekenalemone.rf.gd/15865374444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2cdf549-ac95-483e-9a85-02b3c0277d54/office_365_end_user_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/53997045948.pdfIn PDF document text
    • http://mimumugemefes.epizy.com/esc_eacts_guidelines_on_myocardial_revascularization.pdfIn PDF document text
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_02181e4f20da4820a43038675d22b531.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fad4d02-d73d-4616-9ab9-216459b3a0cd/sharepoint_2013_tutorial_microsoft.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/dbt_mapping_meaning_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c83312e-c65c-4485-9b29-feb9defb4108/2944796553.pdfIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_38b7fc34afce46d482b3eb3472953053.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/how_to_identify_motherboard_model_number.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/w_4_personal_allowances_worksheet_line_g.pdfIn PDF document text
    • http://befadiw.rf.gd/solubility_equilibria_chem_worksheet_18-_7_answers.pdfIn PDF document text
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_49928a5b69994e758883ff69d555523a.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_off00012526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12526 5056 bytes
SHA-256: 82c27146e01eaf01de3b3b4e3592aa94e417e388418040bbd5378bba6f3b160f
font_01_sfnt_off0001362d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1362D 11092 bytes
SHA-256: 64b20ddce0bea5337b7384acac9ec05d96ecdc2c0a82ffa168376559153eca47

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