Malicious PDF — malware analysis report

Static analysis result for SHA-256 629fa46bc54cf439…

MALICIOUS

PDF

78.1 KB Created: 2021-03-21 03:52:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 90342df1f12bd48de8c67a079a074ecd SHA-1: 5d2ad4cf8ecdfeecf1f7324f552a1b05b9859b77 SHA-256: 629fa46bc54cf439b4ec5bfb8bf4cb3b931d9909b5ec5dcf7f96974a8d696265
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 0.9998

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://xezojetit.ru/wix?keyword=bible+taboo+cards+pdf PDF link annotation
    • https://bogigusojuvifu.weebly.com/uploads/1/3/4/3/134316749/3192900.pdfIn PDF document text
    • http://wozupabalaviv.medianewsonline.com/career_paths_medical_download.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/belmont_report_1979.pdfIn PDF document text
    • https://lexikusu.weebly.com/uploads/1/3/1/4/131438729/4949019.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/xuditodorap.pdfIn PDF document text
    • https://fujubonutebi.weebly.com/uploads/1/3/4/2/134266124/74f7ef197.pdfIn PDF document text
    • http://xofajenakimexo.iblogger.org/noditasurapobekebenoboma.pdfIn PDF document text
    • http://0fruits.space/chinese_calligraphy_font_for_macjjveh.pdfIn PDF document text
    • https://mugejonisisekof.weebly.com/uploads/1/3/1/4/131437633/6ddb7d4aa290.pdfIn PDF document text
    • http://redita.fun/defim70vrm.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://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_73f9f05b40d14b399bb19d3d56d0b5a4.pdf?index=trueIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_bb80510645774a88a36a0db33c29e24b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/was_maze_runner_3_filmed_in_australia.pdfIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_355a22bca8284e20887798b37c63c309.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/niporofez/82939605144.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/hunter_commercial_irrigation_controller_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/32700645154.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/the_white_princess_season_2.pdfIn PDF document text
    • http://mujasanowagug.epizy.com/minecraft_herobrine_skin_pe.pdfIn PDF document text
    • http://nipelijikiki.onlinewebshop.net/security_in_cloud_computing.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE804 5020 bytes
SHA-256: 5dd6d060a295e9547c3008b8bb8ad179a60a39a038edf64a0e54dd8746f4350e
font_01_sfnt_off0000f91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91C 10636 bytes
SHA-256: 353290524277350e91621d60ba2151d834d7d71a3887d934075ccfe3f36c01ad
font_02_sfnt_off00011d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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