Malicious PDF — malware analysis report

Static analysis result for SHA-256 a175e06663a14158…

MALICIOUS

PDF

81.4 KB Created: 2021-03-22 23:10:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f00b7ea624f2c8b306fbf0f0b1d847cd SHA-1: bc6d3c981c5d3830b457cbff6068925f259a0240 SHA-256: a175e06663a1415891907a9b98861517f6c560a9315f0f3fd09cc6c161912220
176 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM'. One of the primary URLs points to a domain associated with a keyword search, suggesting a tactic to generate traffic or lead users to malicious content. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the overall structure strongly indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://seumenha.ru/wix?keyword=atmospheric+circulation+video+worksheet+answers
    • https://dezilupogebog.weebly.com/uploads/1/3/4/1/134109094/4674952.pdf
    • http://compte-cmbretagne.best/jisinejagibupoiuoxy.pdf
    • https://cdn.sqhk.co/moromasi/d7jf7zs/12610619632.pdf
    • https://sifijaxamop.weebly.com/uploads/1/3/4/3/134332722/4377261.pdf
    • https://vuzeruferule.weebly.com/uploads/1/3/4/5/134591890/tibiteteju.pdf
    • https://cdn.sqhk.co/tosilura/BMhdxjj/id_card_qr_code_scanner_online.pdf
    • https://cdn.sqhk.co/dewufidabo/ezijTD9/tiny_rails_mod_apk_android_1.pdf
    • https://cdn.sqhk.co/borefigux/uo3jhhg/80626751580.pdf
    • https://seduzitatadobi.weebly.com/uploads/1/3/4/3/134371103/sizopofumuradolu.pdf
    • http://sodahub.pro/2005_jeep_grand_cherokee_laredo_wheel_bearing_torque_specs85vhd.pdf
    • https://mimibixerogogo.weebly.com/uploads/1/3/4/7/134742821/sofob.pdf
    • https://cdn.sqhk.co/guzikiku/hmidhik/play_earn_to_die_free.pdf
    • https://cdn.sqhk.co/xonepogafix/jHjbBhd/53256072160.pdf
    • http://beautysale.site/10479681177wd3ij.pdf
    • http://kmikaerfs.ru/samsung_galaxy_note_4_digitizer_replacementj4lnf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jedaxopopuko/apa_paper_formatting_guidelines.pdf
    • https://s3.amazonaws.com/suxugipipolazog/angularjs_1_interview_questions_and_answers_for_experienced.pdf
    • https://s3.amazonaws.com/fosalizuzu/who_has_the_best_mortgage_refinance_rates_right_now.pdf
    • https://s3.amazonaws.com/dowesitobuga/drenagem_linfatica_manual_preos_porto.pdf
    • https://s3.amazonaws.com/pukiza/80987830121.pdf
    • https://s3.amazonaws.com/degagaziv/faleki.pdf
    • https://s3.amazonaws.com/jejulurowev/taxoxivesugebujidejil.pdf
    • https://s3.amazonaws.com/sezebepit/arkansas_state_lottery_scholarship_information.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4c9.bin
10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 2900 bytes
font_01_sfnt_off0000ff0c.bin
16d058d271b45f92c5502c5d0988f600abd3b3131ae3f097acd138ba597ccd3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0C 5520 bytes
font_02_sfnt_off000111ba.bin
96a9126af4f9d2594f2afd82344747171ead935012299dea861f600ff7a79575		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111BA 11148 bytes

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