Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73cd14ad9aa791f…

MALICIOUS

PDF

75.2 KB Created: 2021-04-02 23:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 231d561bdc29aa8ef0c5d49e7c97959c SHA-1: 9c994caf3ab2771350d0bc82c27385b5800c7d19 SHA-256: d73cd14ad9aa791fa63ad9821517bc47985d0f95838a26c74159b463c5bc6bfe
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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
  • 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://jottigo.ru/wix?keyword=arctic+king+dehumidifier+manual PDF link annotation
    • https://cdn.sqhk.co/suwixowefa/yVhaEja/76082378862.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/ijiKghg/stickman_sponge_rope_hero_gangstar_crime_sim_apk.pdfIn PDF document text
    • https://tofavasexivefet.weebly.com/uploads/1/3/4/5/134578877/ec739b.pdfIn PDF document text
    • https://jemodenot.weebly.com/uploads/1/3/4/5/134528334/49b3b34b1a1.pdfIn PDF document text
    • https://cdn.sqhk.co/raserijene/gdvQifW/new_york_fashion_dress_up_games_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nagasawovebuba.epizy.com/numirojokesi.pdfIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_95db5705c3d543c3bf36f577b751652d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f22ef1f-f60d-4cf4-a500-d0938fdf21e4/class_5_english_grammar_syllabus_ncert.pdfIn PDF document text
    • http://xijotat.rf.gd/mupenif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5df018-572f-423d-9bbc-a392425e5343/gunulowikisabikafatomasuz.pdfIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_91347cbc8d3a4bc897e367d12ba9c6c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/levovod/internetworking_with_tcp_ip_vol._ii.pdfIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_262cd0367d4e4b8f963b2c9a00f3dad4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/batman_arkham_asylum_trophy_guide_ps3.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/html_add_favorite_icon.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/battlerite_royale_champion_guide.pdfIn PDF document text
    • http://ginixotevu.rf.gd/31740560543.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab26e552-1ffa-464d-9ea7-6d415d7e26eb/rs_means_cost_estimating_training.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_8339b591aecd42a99a5feb87678b33d5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d34942c-88c4-48f2-aeb7-47dd07924970/gedakoxosiw.pdfIn PDF document text
    • https://30c74dc1-c3f2-4e71-8253-1ec84f3b94e1.filesusr.com/ugd/b8c6fa_a50b4f7859d9438890957cffe204fa64.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_off0000ea59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA59 5312 bytes
SHA-256: 8a0ab61994689cdda379199d32d2c178db8a54b54fdd73e4b58f15aed6eeb384
font_01_sfnt_off0000fc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC41 10576 bytes
SHA-256: 5353daa83325915f6ea1cfa68aa61f07ad85a3d15349f138132e5baa62a607bb

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