Malicious PDF — malware analysis report

Static analysis result for SHA-256 db802a6ade17634d…

MALICIOUS

PDF

78.8 KB Created: 2021-02-19 20:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c2f79692d73134109489a10cbd5ab3a3 SHA-1: cd251c64c25a1696d473b94e44ce554af946ecbf SHA-256: db802a6ade17634dc6f61ee599e29c889c571fe1a58ed75a37c1e684d314a343
136 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-severity rule indicating it's an image lure linking to an SEO redirector for phishing. The ML classifier and ClamAV also identified it as malicious. The primary IOC is the redirector URL, which is likely used to host the phishing content.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=2014+dodge+grand+caravan+gas+mileage PDF link annotation
    • https://cdn.sqhk.co/kenipafitu/Qhfjdgd/wekilok.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/eugegjh/ginikadedoruweg.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxofalu/jhhLihU/ufc_schedule_khabib_time.pdfIn PDF document text
    • https://cdn.sqhk.co/motuvitewodi/jcidLib/79504521090.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/0gfa5NX/patanjali_yoga_sutras_sanskrit.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/8lGcjig/30526849388.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/aCPjeT1/tm_player_board_free.pdfIn PDF document text
    • https://cdn.sqhk.co/widiroje/AnzjiQn/toy_truck_hill_racing_3d_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/lXzgfid/amc_christmas_movies_on_demand.pdfIn PDF document text
    • https://cdn.sqhk.co/polopomoset/S3REihY/tasuku.pdfIn PDF document text
    • http://povar2020.site/jixeget5isjv.pdfIn PDF document text
    • http://sazodiv.iblogger.org/3294535644.pdfIn PDF document text
    • https://cdn.sqhk.co/guletema/hh5ieXH/78057307597.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/tonemakopinibem/42288392818.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/functions_of_membrane_proteins.pdfIn PDF document text
    • http://kedipakusox.epizy.com/89417713400.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/itc_bauhaus_font.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_off0000edcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCF 5640 bytes
SHA-256: ac2894ebd4b48905c67b10ca579434414ec75dc4147b42c61e9ab07d39be1ba6
font_01_sfnt_off000100f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F9 14116 bytes
SHA-256: 221cf8e88878cd78585e0cd3ab45ca136717ab8e77fe86c3ea08620fd2d5f077

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