Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5acb05d5a2eb5c7…

MALICIOUS

PDF

82.2 KB Created: 2021-04-30 03:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e7edf18fddb5b224671963da4eba19a1 SHA-1: ce1d541d39346cefdc61b2cdc9f16e33d154df42 SHA-256: f5acb05d5a2eb5c79a2bd5cf15adf0e7dd31af9ebfbf8331baadffe97d9c54f9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, indicative of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=onn+portable+dvd+player+car+charger PDF link annotation
    • http://fartook.online/intex_saltwater_system_code_00u3c05.pdfIn PDF document text
    • http://milanbeach.fun/rafepopoto4pins.pdfIn PDF document text
    • http://zyzycheat8.xyz/rovepapexamivaxdmil.pdfIn PDF document text
    • http://rgtuitp.ru/how_to_get_good_at_ethical_hacking4gp9n.pdfIn PDF document text
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/1781528.pdfIn PDF document text
    • http://academic-club.ru/sunding_sd576c_bike_computer_instructions44tes.pdfIn PDF document text
    • http://virona.org/kowisofobokusewexawuyl8gq.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/stewart_calculus_early_transcendentals_2nd_edition_answers5wc6g.pdfIn PDF document text
    • http://50offshop.info/88347525578hnz7f.pdfIn PDF document text
    • https://luvidobanuneje.weebly.com/uploads/1/3/1/6/131606009/489502.pdfIn PDF document text
    • http://smilex.club/simile_metaphor_personification_examples0pqfh.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
    • http://vuvazapej.rf.gd/63865555542.pdfIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_696a7cd5b7a445deb940461fa9613bee.pdf?index=trueIn PDF document text
    • http://laraderedo.epizy.com/78722430841.pdfIn PDF document text
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_64319fed037f4be3b73d97e6ed18dfbd.pdf?index=trueIn PDF document text
    • http://rovigugidolu.epizy.com/air_entraining_admixtures.pdfIn PDF document text
    • http://fetewuzapozoza.rf.gd/79605176242.pdfIn PDF document text
    • http://jeloneliva.epizy.com/dewetowuj.pdfIn PDF document text
    • http://vizamozinavaro.epizy.com/house_rental_agreement_format_in_tamil_free_download.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_off0000f6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 5228 bytes
SHA-256: be15ce328a56daf5cd2da5b7e6ce702497c7d7d0f08386a45a4690fc998cffaf
font_01_sfnt_off00010870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10870 10900 bytes
SHA-256: 97cea7a736b5f78dad3936d45180fad87c923d2fa51ce431ca97408cadda148b
font_02_sfnt_off00012d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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