Malicious PDF — malware analysis report

Static analysis result for SHA-256 da982c7b296ebdfc…

MALICIOUS

PDF

92.6 KB Created: 2021-04-11 23:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 88cff34f24dd3f57d128d657f0b16466 SHA-1: 2be9ae0139a185ce9bc72bc383aee84585db7c6e SHA-256: da982c7b296ebdfcabe0377278ca91bc02094cc5276a49f41574402e8cd80e95
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 0.9997

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://maypoin.ru/strik?utm_term=simple+java+game+source+code+download PDF link annotation
    • https://cdn.sqhk.co/pixorikibam/Pjajjgg/88096597860.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/Oj5jjqv/toolbox_murders_2_ending_explained.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/ZsZof2K/60030228496.pdfIn PDF document text
    • http://nozijepirag.22web.org/wuvegobuxarevitotag.pdfIn PDF document text
    • https://cdn.sqhk.co/gipekoma/DzJThcc/rerovovufodolotat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4a5bfc55-71df-4474-8f3e-9f6aca65c64b.filesusr.com/ugd/29b6ce_d3e4fc38bbd8420ca3737a788eb97d04.pdf?index=trueIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_faaa4add8d50498f9d5b70ff4c327d28.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ea9d49e-d356-4db0-aaca-a8e52727cebf/kolorejerabakemawe.pdfIn PDF document text
    • http://favifodov.rf.gd/86004283072.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/how_do_i_fix_the_attention_required_on_my_hp_printer.pdfIn PDF document text
    • http://dimaninerif.rf.gd/penatoworekiw.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/lulolola.pdfIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_41d473c3a2e345d0bcf8d0fcd6de013e.pdf?index=trueIn PDF document text
    • http://wokixewo.epizy.com/phonics_teaching_materials.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b9d0e8-b58a-4b0c-874d-549ea78a032d/32044002040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d5b8524-f6a4-4f13-bede-ee5582d63fc6/2004_6.0_powerstroke_transmission_cooler_lines_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/wemokemufitebosonabesot.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/7006309593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4b628e5-17d9-4265-9a2c-f5c5a250f46c/conceptual_physics_chapter_35_review_questions_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac0f97a-83ad-405b-9166-9cf86bc296cb/sawezixaxadojikuwamu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DC 5724 bytes
SHA-256: 9c88a79528d98cca47e7fdbb8f5a27718be6f51d2c190005bc41850a1ae67fbe
font_01_sfnt_off00012656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12656 11956 bytes
SHA-256: a33f22d40a266fe453213bda5c2ba856938a787d35a018c8ecd1cf6113a9e142
font_02_sfnt_off00014f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F3F 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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