Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5faa14d25e691c7…

MALICIOUS

PDF

77.9 KB Created: 2021-03-13 23:59:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ddc7f74105c65e7dd2afb47786ea7eb7 SHA-1: 1361f5915ba1e8614e883cccb18c60d0bd85ac99 SHA-256: d5faa14d25e691c7a509f0922645ab149435e9ae4d423f4f80b8c052af8e727c
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://seumenha.ru/wix?keyword=paas+instructions+foam PDF link annotation
    • https://cdn.sqhk.co/panufarubel/zgcagfT/18473886526.pdfIn PDF document text
    • https://fonuwinozizanam.weebly.com/uploads/1/3/1/4/131408397/7b8a20115d64e5.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/2tweuBu/fijorakeluseposunipeg.pdfIn PDF document text
    • https://cdn.sqhk.co/rebosuvut/icfI0jf/zirojobomepo.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/whjidgf/root_board_game_expansion_kickstarter.pdfIn PDF document text
    • https://tizusetupo.weebly.com/uploads/1/3/1/6/131607013/3443570.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/icqhijf/75335884198.pdfIn PDF document text
    • http://arnautmebel.ru/grade_4_math_word_problems_worksheet_answerszaaol.pdfIn PDF document text
    • http://bestrongbyg.com/terminating_employment_letter_template2cv8o.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/cgfjhvK/hallmark_channel_shows_on_netflix.pdfIn PDF document text
    • http://dfds.in/kabeguxutural1sy9.pdfIn PDF document text
    • http://devlp.club/how_much_psi_does_a_good_pressure_washer_have7r9tx.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/jdjgjiN/metal_swing_sets_for_sale_near_me.pdfIn PDF document text
    • http://topcreditreport.info/best_android_emulator_for_windows_108o5pq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_0e8f97f9952b46bfb05108038b15e32d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/mulawowiwaganojeroroka.pdfIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_257af8751f8f4183bb8aaf43fd608bb7.pdf?index=trueIn PDF document text
    • https://7c3a386c-9197-44ff-a2a0-26a6be1b6260.filesusr.com/ugd/bba797_cfb2c48e1c9f425eadfd3e7d99b93263.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/apollo_addressable_fire_alarm_panel_manual.pdfIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_f139a5207a00452499ba2a26fcd46bea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovigebi/bsc_psychology_textbook.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF107 4996 bytes
SHA-256: 47ea45cee5269f32115c80fbb7bf63bfa4b69f7e1f48252d662ccdacd89e8db7
font_01_sfnt_off000101f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F2 11264 bytes
SHA-256: 04e78bbe41c89f7fdcc5e26ed877f608acd91541b15d87b043e170c0d081c4d7

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