Malicious PDF — malware analysis report

Static analysis result for SHA-256 801eaa475f506e7a…

MALICIOUS

PDF

74.7 KB Created: 2021-04-05 11:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: f4538eb5ed59708b093c82287daae56e SHA-1: c69862842706d495938664df16fb5f489cdbb7eb SHA-256: 801eaa475f506e7acb4427e1a844037a30800404dbd44fde6f0301d8cdf15704
126 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains multiple embedded URLs, with a primary suspicious URL being https://mezovuduw.ru/123?utm_term=request+of+experience+certificate+format, which is likely used to redirect the user to a phishing or malware distribution site. The PDF's structure and embedded links suggest it is part of a phishing campaign.

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://mezovuduw.ru/123?utm_term=request+of+experience+certificate+format PDF link annotation
    • http://pss77.ru/is_soda_sugar_freew6ixf.pdfIn PDF document text
    • http://apparentlyopt.com/sushant_singh_rajput_new_movie7ozgv.pdfIn PDF document text
    • http://lalixodurabemu.iblogger.org/songbird_christine_mcvie_piano_sheet_music.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/4173706019.pdfIn PDF document text
    • http://bluebadge-support.com/73899154706zvmlv.pdfIn PDF document text
    • http://silvanozito.online/24559866965cvw3d.pdfIn PDF document text
    • http://xiwesesakuvel.medianewsonline.com/7505629982.pdfIn PDF document text
    • http://betixisu.22web.org/alcohol_withdrawal_guidelines_thiamine.pdfIn PDF document text
    • http://salebox.shop/29975178718ef6f3.pdfIn PDF document text
    • http://bekusasodix.iblogger.org/delewoxigidi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4644960-09de-45d5-a858-0d522486fe00/69107309318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bff55c5-7997-4660-bd97-d1bcc3afba6d/cuisinart_2_quart_ice_cream_maker_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d618c16-0394-4faa-a72f-7d628c678390/82162729551.pdfIn PDF document text
    • http://rebagada.rf.gd/64769077154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc644822-0b55-471c-a57f-3cce4901a958/caracteristicas_politicas_del_siglo_xix_en_espaa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad86e2d-95fd-4b32-a350-78204b6ac304/jedirivoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/130ae064-d61a-496c-ab47-cf2ff091f787/60512327801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d8cb7de-5003-4e2a-aa21-6506da862372/guns_germs_and_steel_documentary_episode_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd063d27-77e3-440f-9dcc-5ee4036a206b/87127070216.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AD 5328 bytes
SHA-256: ebf8d3440ce93c2e2e45b6c180ca109b50e252b938a0caddc52ee8250243ae21
font_01_sfnt_off0000f6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CE 10948 bytes
SHA-256: a5c9a8528186984152dcfb64a9de5abc594c7bbc795624b7a1ce695a124c958d

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