Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b8d2260a4fa1c6…

MALICIOUS

PDF

69.8 KB Created: 2021-03-05 17:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a6896407c4acc0437ee79256d7b52572 SHA-1: ad7e16707909f707e9565d850188feb779c77b66 SHA-256: c3b8d2260a4fa1c6f753d5f253d1e7a8345bf156d1f92fd247da794297c246cb
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. One of the primary URLs, dugedepap.ru, is associated with a search query for a specific product, indicating a potential lure. The presence of embedded links and the overall structure point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://dugedepap.ru/strik?utm_term=samsung+jitterbug+flip+phone+charger PDF link annotation
    • http://xadikefivo.iblogger.org/havana_clarinet_music_sheet_easy.pdfIn PDF document text
    • https://jefaxuler.weebly.com/uploads/1/3/0/7/130775921/gitovelitusatedufo.pdfIn PDF document text
    • http://xelirap.22web.org/babusan_hero_photo.pdfIn PDF document text
    • https://kopezufotixese.weebly.com/uploads/1/3/1/1/131164020/954ab67b49d3b.pdfIn PDF document text
    • https://jokasagumejede.weebly.com/uploads/1/3/1/0/131070006/zevasatidifar-zetasogakuz.pdfIn PDF document text
    • https://bojibelatos.weebly.com/uploads/1/3/4/0/134040608/vowifadose.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8e8ef6ac-913c-489f-8395-c30730e7ba0a.filesusr.com/ugd/f39c52_02f153a3ea9e43f2b4a4299f05f3f1e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f765b6f-44c9-4e04-bc70-888c4ec7cb87/dezorinijisebozud.pdfIn PDF document text
    • https://af431a04-9ebc-4ea4-a98d-45e4ffbfad14.filesusr.com/ugd/485053_fcf80f4f6e9843c68e7caac81cbb0185.pdf?index=trueIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_4cbfb4b0358a4c6cba57f3d8a6637a61.pdf?index=trueIn PDF document text
    • http://vabuperupijod.epizy.com/zepagoji.pdfIn PDF document text
    • http://xamupufe.epizy.com/24627992093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a60e689-93f1-4954-97a4-449bbc18a8b6/dyson_cordless_vacuum_repair_manual.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_d188ed67255548c08ed26cfeac27f719.pdf?index=trueIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_69ac33c287604cb395736a21237c5376.pdf?index=trueIn PDF document text
    • http://betiravel.epizy.com/aws_s3_console_multiple_files.pdfIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_9e60b0b205a5457db672debf6917e29b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9178af52-5802-4b38-b506-f3664af6622f/49318174195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26ded6a2-1478-4168-b819-29ee56a86467/switch_v1_vs_v2_differences.pdfIn PDF document text
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_65e00bd3e9b94b8d89a28abe8dc988b4.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_off0000d154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD154 5748 bytes
SHA-256: 4e5ccc2449687ce3ad9fb4e03a63dde7fa72f01426afdc8b543232c7fdad207b
font_01_sfnt_off0000e4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C2 11040 bytes
SHA-256: 9bde1bc40a0ba7aa020e1877f5c186b9c7c1f487f045f3ec7db3b1f97a406a60

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