Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7e73c5b929276a…

MALICIOUS

PDF

77.3 KB Created: 2021-05-09 02:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a3bad0a59572966b1462211bf93663fa SHA-1: 346cd28fe2c38428857b84a0a7bcedc4d73d653d SHA-256: 5d7e73c5b929276ac7148099e15a82650fe35bf0c74544fd3934ef77102aad53
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, 'jumiwimov.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to search queries, suggesting a lure to a malicious website. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jumiwimov.ru/strik?utm_term=do+they+still+make+magic+chef+stoves PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424026/normal_60530d91939c7.pdfIn PDF document text
    • http://casserlabs.xyz/bob_revolution_pro_stroller_manualmpjt1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485434/normal_601a474946212.pdfIn PDF document text
    • http://brandframeb.com/mipavusezlj2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446036/normal_5fee779fe52f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499995/normal_6001054153532.pdfIn PDF document text
    • https://susejovidexoxi.weebly.com/uploads/1/3/0/7/130775922/zilij.pdfIn PDF document text
    • http://choosenews.space/13277535873vo1an.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/true_love_tester_appu6ngq.pdfIn PDF document text
    • http://livecopyrightverification.com/did_charlie_die_in_flowers_for_algernonoau5e.pdfIn PDF document text
    • https://lebuwaner.weebly.com/uploads/1/3/4/4/134478239/xitibotije.pdfIn PDF document text
    • https://mabexerezigija.weebly.com/uploads/1/3/5/3/135324341/bekofe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467927/normal_5fd32f45669af.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/tometubufimopim/dogokelorixewi.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/berserk_1997_series.pdfIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_617f1026d7c94ed3a8aeb850cdc60c5f.pdf?index=trueIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_af0839d810b64ffa9183d197260febbe.pdf?index=trueIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_7f46ef047d214c2cbf19c4e2cbeb951c.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_off0000ee51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE51 5424 bytes
SHA-256: 282327d009b0b916ee4924a5ae08ac443b1054743298bbe7efa71da853bd026a
font_01_sfnt_off000100c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C0 11864 bytes
SHA-256: 91d00acec075bd9ce98d2a08fc75f0e366bafbc243d7124c9a01d6a7d7845634

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