Malicious PDF — malware analysis report

Static analysis result for SHA-256 769b887b187705fc…

MALICIOUS

PDF

70.3 KB Created: 2021-02-10 02:55:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6f2492149c8bff81afdc8876d97b2cae SHA-1: d559dc8ebdd686f5ccb889ed62277b77ade64316 SHA-256: 769b887b187705fc7732cbd123f517fdf2922357b907bed69f6f71e3f4ff763f
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a high-severity heuristic indicating it is an SEO redirector link used for phishing, specifically a 'free-download phishing' lure. The embedded URL `https://jacksth.ru/aws?utm_term=12+volt+to+120+volt+transformer` is the primary indicator of this malicious redirection. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/aws?utm_term=12+volt+to+120+volt+transformer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470962/normal_5fcff348e04f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405440/normal_601e38944b272.pdfIn PDF document text
    • http://rukozhop-guide.com/modified_messenger_apkfncpt.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/ibjcnhg/fun_science_games_for_kids-_free_interactive.pdfIn PDF document text
    • http://salonvarna.com/fundamentals_of_corporate_finance_11th_edition_ebookqmyjt.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/p7jaW5F/download_game_zombie_hunter_king_mod_apk.pdfIn PDF document text
    • http://italia-doc.space/casablanca_guitar_tab7tfzo.pdfIn PDF document text
    • http://grizhoff.ru/54116405848fbpbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489414/normal_5fcf5e872af04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481056/normal_5ff0f3984375e.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/4KFdji9/82215462796.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/dhbSfQm/champaign_social_work_jobs_toronto.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/ha0aii5/korajojorime.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423471/normal_5fd06836624b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367286/normal_5ffbd724b793d.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/bakoloj/nekidekovuzix.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/jijukabi.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/jedemiwotedarosixefumezav.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/invitation_card_psd_file.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/31077544611.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55A 5204 bytes
SHA-256: 796524dd925b713e1b44db0022570bbddd3c9526727b82af333f5216665e68b9
font_01_sfnt_off0000e6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FE 10964 bytes
SHA-256: 1a9b63eb15c325a675df91ecefa400fac168c9aac7dc1e2dad90f8c74e01ac08

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