Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4b84530b22d6c2…

MALICIOUS

PDF

70.2 KB Created: 2021-01-21 08:16:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0e9481faef5813e4c3edd3cd7433b8a9 SHA-1: 74ee84357bb0a54c9bca971933df7252af834c90 SHA-256: 6d4b84530b22d6c2af2003224d65595e78e45a731835fada1321802ea79baca9
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary external URI pointing to 'trafffe.ru', suggesting a redirection to a malicious site. The document body, though heavily obfuscated, appears to contain metadata related to 'wkhtmltopdf' and a date, but lacks clear user-facing text to indicate a specific lure.

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://trafffe.ru/123?utm_term=mrs+potts+and+chip+tea+set PDF link annotation
    • https://site-1228403.mozfiles.com/files/1228403/tujejesivulugasovapixel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453741/normal_5fae11b2374a1.pdfIn PDF document text
    • https://site-1177540.mozfiles.com/files/1177540/vestly_app_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/dowufagit/RHfX9FS/gavubemafiki.pdfIn PDF document text
    • https://site-1178280.mozfiles.com/files/1178280/mars_rover_2020_name_plate.pdfIn PDF document text
    • https://solezoxi.weebly.com/uploads/1/3/4/6/134654925/salapepuxifu_fijememupe.pdfIn PDF document text
    • https://site-1210486.mozfiles.com/files/1210486/76178706925.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/KNge56Q/flix_movie_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465919/normal_5fa2aba65aefa.pdfIn PDF document text
    • https://melijezaziwoni.weebly.com/uploads/1/3/4/8/134851492/8442432.pdfIn PDF document text
    • https://vidajubobulixi.weebly.com/uploads/1/3/4/6/134650234/xeravoxedim.pdfIn PDF document text
    • https://cdn.sqhk.co/fofesali/PYOJjhP/lexevedatifafomasujosuvi.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/yhhvvAx/yellow_book_cover_design_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/ii8ggF6/sununif.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://s3.amazonaws.com/galinikagopit/96124685126.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/agreement_letter_template_between_two_parties.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/vujuwufapixojelatadov.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_off0000ca11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA11 4920 bytes
SHA-256: 4bc9318f1e2963e0fb295f249ef634c02a56aa00831ddd727ec4cd1eca64535b
font_01_sfnt_off0000dab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB8 10244 bytes
SHA-256: 106dcf94b7ded61b8e0822aee0865af850083a79337ddd679fb3e4bd1f57cb7e
font_02_sfnt_off0000fdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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