Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0c1da6a356f6b1…

MALICIOUS

PDF

77.8 KB Created: 2021-03-23 12:12:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3d9d0b4b6fa1f6a775c84778de4f86c4 SHA-1: 02cbddb58d25e51d80a77141c34be5acb8168084 SHA-256: 7f0c1da6a356f6b1d2c00fc895ab26fe002813c486eba70cb16c2203fa2cbeb0
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-severity 'PDF_SEO_UTM_REDIRECTOR_LINK' indicating a free-download phishing lure. The ML classifier and ClamAV also identified it as malicious. The primary IOC is a redirector URL that likely leads to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/123?utm_term=sports+performance+trainers+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459034/normal_60557584a6a54.pdfIn PDF document text
    • http://agent-ritual495.online/what_is_meant_by_public_speaking_anxiety2hgpk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5fe6ca3b741f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414357/normal_6000adaa9c1a0.pdfIn PDF document text
    • http://cuzinfo.ru/jazumisenabodkhxsr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387240/normal_6013321ef2ba9.pdfIn PDF document text
    • http://loveantravel.xyz/north_pole_rock_and_roll_music_k87tpq1.pdfIn PDF document text
    • http://mnogoturov.com/guwuvizipidemavej65ccl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460460/normal_5ff75806d63f5.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/jutenojamega/wixuguzomup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dd0301a-2ea0-4252-8db7-c9d7f0b97341/19136581915.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/kigezatavuzateluferifuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/lareweketi.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/auto_electrician_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/picostation_m2_repeater_configuration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c90cf8ff-7f5e-4b45-8c74-76e4f03839fa/wikirovijikupabokan.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/sikuzolerasunixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86bb45e0-0605-45a5-9cde-6341fb64a161/wezobowifapojitisajegit.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/95555287048.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/zofip.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/how_to_talk_to_a_person_at_nc_dmv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b55161c7-1e36-4ad4-a565-a518d34d599d/xemezofutaxonuxitef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d9b948-ef48-4cba-8e59-8a68af013e6f/vopudafotevisefakilopeniv.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/free_design_templates_for_photoshop.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_off0000f0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DD 5232 bytes
SHA-256: d0b9187f5bc2d1ec6ae1d26489ef3c8b1eab906803130bda6cc64955232912b4
font_01_sfnt_off0001028d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028D 10808 bytes
SHA-256: 10ae79cb705d1a9805b67d1cb4296c86b734a3ec3310a68dd97e898da01fb3d5

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