Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b720404ed18efe1…

MALICIOUS

PDF

77.7 KB Created: 2021-03-25 08:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: efb9718ea796dcdea2eb28dcd9072744 SHA-1: 2c663a0f2ece6ad14c178ae0ac3a4e3afbd48a02 SHA-256: 0b720404ed18efe1c94725fbbc64c62e09f6bb01242e763afa2c2ed411e76ade
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or link-farming scheme disguised as wedding planning content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://nipisod.ru/wix?keyword=how+to+be+a+better+wedding+planner PDF link annotation
    • http://reliables.ru/95479159281j528s.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/fibomerutafasodafujigirid.pdfIn PDF document text
    • http://copyright-rules-help.com/98451830129vr8t8.pdfIn PDF document text
    • https://cdn.sqhk.co/xonumizeno/Mhfgegg/81400053124.pdfIn PDF document text
    • http://xajekuk.22web.org/corporation_tax_act_2020.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/2008_ford_escape_abs_brake_problemsngow7.pdfIn PDF document text
    • http://larts.digital/jivozodorizetonotwjhyg.pdfIn PDF document text
    • http://sigixexizo.sportsontheweb.net/xemenatalubujivu.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/hdBwL5V/multiple_coin_rush_tickets.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/food_for_life_menu.pdfIn PDF document text
    • http://mattelipsticks.site/45460725330trqt6.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/wazotojemov/battlefield_3_mobile_game.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/708128254.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/cognitive_behavioral_therapy_worksheets.pdfIn PDF document text
    • http://gedokimisizat.rf.gd/kewozuvonojelulozidexe.pdfIn PDF document text
    • http://golinab.rf.gd/what_to_write_in_an_18th_birthday_card_for_niece.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/84003692213.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/barbara_cartland_gratuit.pdfIn PDF document text
    • http://kemeterotef.rf.gd/87165830280.pdfIn PDF document text
    • http://zapusov.atwebpages.com/2403553675.pdfIn PDF document text
    • http://xupasafagimi.rf.gd/20176482652.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_off0000f1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D2 5144 bytes
SHA-256: 586314776ade92633926218fa8669f47f8851ed9220e0a90b310957b03b34f8e
font_01_sfnt_off00010369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10369 11488 bytes
SHA-256: c992e894ca235bec9ec3ffbe90007afceb54f2819b4f7327109b97a6e1776856

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