Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41aa5fb99ccd2fb…

MALICIOUS

PDF

79.9 KB Created: 2021-03-15 10:37:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 73a14e74e8d1f6568c789ab485875fcb SHA-1: 237117b5de98787eefcb7f710b4f45b0564683e3 SHA-256: d41aa5fb99ccd2fb8f72660a65eff8aa2435c939ecdf24816fa90d4eeb34d0f8
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 ClamAV and an ML classifier, as malicious phishing content. It contains an embedded URL that redirects to a suspicious domain, suggesting an attempt to trick users into visiting a malicious site. The document body, though heavily obfuscated, appears to be a lure related to 'Beautiful creatures tarot 1st edition'.

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
  • 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://jottigo.ru/strik?utm_term=beautiful+creatures+tarot+1st+edition PDF link annotation
    • https://cdn.sqhk.co/sevimifogu/YpigKhc/bt3110_cordless_dect_phone_with_answer_machine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459028/normal_600dc54d8427b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387699/normal_6005d60d4d36e.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/hjheCji/italian_musical_term_meaning_lively_quick_tempo.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafepel/cAEIAjf/archery_world_cup_winners.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://uploads.strikinglycdn.com/files/654414b5-3bcf-4a86-9f89-c59ecbc8a6b6/how_many_calories_in_bojangles_supremes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e82440a-8eda-4d76-852d-2dda122c1d95/19756561172.pdfIn PDF document text
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_52d8d58c8d124c4cb5767b416cd18626.pdf?index=trueIn PDF document text
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_aa7df7607e8b4b5dbd2b232fa48e5d6d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/xexarevaduxakovale.pdfIn PDF document text
    • https://7f2467c6-0d80-4e38-8df7-27624e0b9669.filesusr.com/ugd/e19533_a050b0c0d3214b5e8ac9a34f7160deae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mizeteb/temperature_conversion_problems_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/20846893189.pdfIn PDF document text
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_c2b48802bd4f40b79abca086e8133380.pdf?index=trueIn PDF document text
    • http://puwomuf.rf.gd/who_guidelines_for_hiv_opportunistic_infections.pdfIn PDF document text
    • https://7e70056c-c2aa-4e53-98c5-50750123c107.filesusr.com/ugd/f8ae5d_a117d141a71a4f8d9990995ce996a38f.pdf?index=trueIn PDF document text
    • http://gagavig.rf.gd/80455956273.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/xitubazisimudisakonisado.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/wowenanixuvodefodisizu.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_off0000ec4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4C 4996 bytes
SHA-256: 6726f91df864a66237aa4629c3f213316720bbd9aefdfa65b80b4bcadb44236f
font_01_sfnt_off0000fd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD53 11440 bytes
SHA-256: 401342eba388f73a046bef3ebabea0aed4eb4dea12018e4e85796a3782937358
font_02_sfnt_off0001243e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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