Malicious PDF — malware analysis report

Static analysis result for SHA-256 343e1073f68eefaf…

MALICIOUS

PDF

90.6 KB Created: 2021-03-20 15:21:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9d054b25cc120fb3f762aa5a50c31ba6 SHA-1: 97554959c75538c1f96637023b35c94734f8e409 SHA-256: 343e1073f68eefafae71430374a9fd2afcd0d16aed2344f4609b5e2629d40f87
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 0.9996

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 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://crophysi.ru/wix?keyword=my+name+sandra+cisneros+text PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488135/normal_604a2d51b24df.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzudumijamo/ij3Hhhi/avengers_endgame_hd_wallpapers_for_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/gazamara/jAEiGma/strategic_thinking_skills.pdfIn PDF document text
    • http://marketop.club/38327674548lqolx.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/hioanb4/best_luxury_brand_management_courses_in_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_60222561a593e.pdfIn PDF document text
    • http://chambreapp.xyz/90302569634dd8fg.pdfIn PDF document text
    • http://vashobereg.com/weber_bbq_best_price_perthz1g44.pdfIn PDF document text
    • https://cdn.sqhk.co/madilaxetevo/hajRThb/83181841620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5fd2f72b133e1.pdfIn PDF document text
    • https://cdn.sqhk.co/nakijalufiw/iT3Zx1z/ziputofikeji.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://s3.amazonaws.com/jinabom/will_there_be_a_season_6_of_magicians_on_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/fikalarokigozilotudoz.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/gram_positive_cocci_bacteremia_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/volowo.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_482f027a17ec4d06a89b37ae4c89e014.pdf?index=trueIn PDF document text
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_7345b37f7183461c97a41fb4274149ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/57582722658.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/70250415363.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/16226159848.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/berliner_platz_1_audio_cd.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_off00011844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11844 5016 bytes
SHA-256: 85361ff68d7cfcdfea6d827c82dc80921f0b341c2efd4d50a60f19988bb7edc4
font_01_sfnt_off0001293a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293A 11108 bytes
SHA-256: 0f6e8f56b055cd9e1e44cc6606614741bb0b84e43d60c16582b28f0885adcb19
font_02_sfnt_off00014f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F35 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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