Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54bfead0519145d…

MALICIOUS

PDF

72.6 KB Created: 2021-03-28 11:34:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 801caea5a424afaed1ec72f8ef3f825b SHA-1: eb5b002b3e8985018fa162695daf769e9ae408ff SHA-256: b54bfead0519145d15087be0ab45a5283092a5853dd05313e8114b1eba588402
156 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 0.9993

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 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.
  • 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://fokemale.ru/123?utm_term=canon+g2000+printer+driver+for+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497658/normal_60323b92213dc.pdfIn PDF document text
    • http://civiliscmq.online/5752865019099bda.pdfIn PDF document text
    • http://toppiksnack.xyz/seagate_srd00f2_power_supply3plug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444636/normal_6046fe6616598.pdfIn PDF document text
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/4773161.pdfIn PDF document text
    • http://fb-ig-violation.com/beatsx_owners_manual44hl5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_60469d5ae3b7a.pdfIn PDF document text
    • http://kyhni.site/81872658261p1cpk.pdfIn PDF document text
    • https://dimejozetef.weebly.com/uploads/1/3/1/0/131070151/0cfe111d3c725f6.pdfIn PDF document text
    • http://basiditdcf.space/ip_address_for_tm-ac1900_routerzfbn8.pdfIn PDF document text
    • http://bitjoms.xyz/fall_foliage_report_ny_statey5mbq.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/wimexopeloz.pdfIn PDF document text
    • http://maewallace.com/gutenefolekibefapediritedc9g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/what_hormones_affect_thyroid.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/21640926395.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/ashab_kehfimiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/bsf_online_registration_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/vygotsky_cognitive_development_theory_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/old_school_tobias_wolff_review.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/little_house_on_the_prairie_season_2_episode_15.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/5883604002.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/fixed_column_google_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/lalamezosubovizowidugifu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBA 5504 bytes
SHA-256: 2ddbb58c12759588eacbc8477c1dc8896fc8478893f7d6b1dbf4a66c26aafc0a
font_01_sfnt_off0000f06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06F 10716 bytes
SHA-256: bddc8587898583487ae6629b9990dcc264d92b169aa864f8937a6cb4ab7630d1

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