Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e0c93b559d71c2…

MALICIOUS

PDF

72.2 KB Created: 2021-03-24 10:56:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 795fbe92f38885a70913b81b1991cb88 SHA-1: 5f762d17c8d5e57c905159d34c1a8ac56d089e1f SHA-256: 45e0c93b559d71c266d8b62e145fe0b6fa81307978e3c8b03396447e654a97bf
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 6

  • 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.
  • 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/award?keyword=your+brain+at+work+pdf+download PDF link annotation
    • https://cdn.sqhk.co/letarezetap/glkiijh/37947139217.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/iNigeQ5/cut_flower_garden_design_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/gpPKj0y/kujuweviterevilapozumanoj.pdfIn PDF document text
    • https://cdn.sqhk.co/ropimipaf/jieihiY/battle_city_tank_1990_nes_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/dokadajij/w6jeER9/home_health_clinical_manager_job_description.pdfIn PDF document text
    • https://bifixebuwo.weebly.com/uploads/1/3/0/7/130776276/sufiwade.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/gdtMtjg/drop_it_down_low_pick_it_up_slow.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/didihii/bazewabogesenat.pdfIn PDF document text
    • https://fofagova.weebly.com/uploads/1/3/4/3/134313529/5558062.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/a7c0a3e7-01ad-4aab-b9b3-c25392de2028/68629738701.pdfIn PDF document text
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_5344940dd03a4ef2844a2d213ce8cbf2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/pabijoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/the_spectacular_now_full_movie_300mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/569bec54-3a18-4858-b408-b76594fb1fd7/migadefedatuxir.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/60167280081.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/bezujeritola.pdfIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_da37198d7b514bf5887cbf23c5d05395.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c13c76-9337-454e-9640-6869be7cf796/90296561092.pdfIn PDF document text
    • https://de26864d-dd79-4a6d-8467-b5cf435a6969.filesusr.com/ugd/6ff07c_d5ea8c610a3f4f788fe99f575ecf6e9c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE38 4876 bytes
SHA-256: 39d2aa088d10fd0e45dce420507a477e77f2f02f13743bd4103a566561688e98
font_01_sfnt_off0000dee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE0 10848 bytes
SHA-256: 52b30f5b1d7e6172eed818163b2bfd593c04b41a450ab7b25dff84fc1d47e920
font_02_sfnt_off00010406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10406 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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