Malicious PDF — malware analysis report

Static analysis result for SHA-256 a602a0e190e7545a…

MALICIOUS

PDF

82.2 KB Created: 2021-03-14 05:31:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: aabbb3699c3d0581d54885c282911f9d SHA-1: 7813bd815270ac5e1617ec88719db7f81e4079cd SHA-256: a602a0e190e7545affbd7eccbc8369c1ed9d4d8387799178527cbb808d70cc99
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The embedded content, though partially corrupted, includes a lure related to 'Bombay dyeing bedsheets for winter'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://xezojetit.ru/123?utm_term=bombay+dyeing+bedsheets+for+winter PDF link annotation
    • http://tafuvomilo.22web.org/dasilugetudaporejoziwudi.pdfIn PDF document text
    • http://sozapemogoz.mygamesonline.org/33098073130.pdfIn PDF document text
    • http://nubigawe.22web.org/what_are_the_two_advantages_of_glycolysis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374203/normal_6046f320e02cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_6041d81e498ad.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://uploads.strikinglycdn.com/files/fd4a1be4-3849-41da-afb5-99b108da0783/60011550795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e768e9a3-94bd-4a21-a4b3-b3620f578ca3/40003482831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba4b51d-7fb7-4b92-af52-3919aa24bb50/drug_calculations_made_incredibly_easy.pdfIn PDF document text
    • http://lodusebivepakef.epizy.com/villager_trading_guide_minecraft.pdfIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_09847202fb27452b863c2951ac83a34a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0461b311-484d-4c39-a18b-000eaaa818f0/vegetarian_indian_recipes_instant_pot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c1a80b-2607-4ff4-be8f-3c3fad6f4e4f/39317911779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df4e655-3ed7-4ad4-b173-d27196769752/sony_tv_remote_codes_5_digit.pdfIn PDF document text
    • http://mukavazoxa.epizy.com/adventures_of_huckleberry_finn_oxford_bookworms.pdfIn PDF document text
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_59aa4c74a03542e6a49cc826f2478523.pdf?index=trueIn PDF document text
    • http://wivaxodi.onlinewebshop.net/juwudalalimumexadadaporax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/595e31d7-e190-463a-83ba-c556279f8940/how_do_you_manually_clean_brother_printer_heads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4d4e5b7-0bbd-4cea-917d-6477971f0b93/brocade_fabric_os_administration_guide_7.4.1.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF68 5460 bytes
SHA-256: 91ba870edf7a4c87459b6b91c4a16d4869408a961bc7a5ac3e61aaf9c62d49bd
font_01_sfnt_off0000f1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DF 11120 bytes
SHA-256: 10c174bc2f5e0b9be5e2c359fd6ed272a4118a92602bc2a857f3e72b61c07c93
font_02_sfnt_off000117d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D7 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
font_03_sfnt_off00012cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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