Malicious PDF — malware analysis report

Static analysis result for SHA-256 4013af81210f28c5…

MALICIOUS

PDF

70.3 KB Created: 2021-02-13 01:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 0074a6f56738a972d54c1d81a4a37bd1 SHA-1: 95cf016a03eb55bdd510d14f97e073e0b7d8d09e SHA-256: 4013af81210f28c5c252fcde4479162aa3d508b4e33c4b27dce206baea926ef0
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a URL that appears to be a lure for downloading software, specifically 'truecaller pro apk'. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into downloading a payload. The presence of multiple unknown URLs further supports this phishing-like behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=truecaller+pro+apk+latest+version+download+for+android PDF link annotation
    • http://trydouche.xyz/mars_rover_curiosity_landing_videoi10mu.pdfIn PDF document text
    • http://luminar2-download.xyz/keriredepabufyiuf.pdfIn PDF document text
    • http://igme.site/rulapidasowokufeg1is5.pdfIn PDF document text
    • http://titoto.xyz/collagenase_ointment_davis0t478.pdfIn PDF document text
    • http://beamorem.com/robux_calculator_aud1mt23.pdfIn PDF document text
    • http://euroshopme.site/rewaxanuvujugejikoriseb19t97.pdfIn PDF document text
    • http://rubarenuruvofi.iblogger.org/fasb_interim_reporting_requirements.pdfIn PDF document text
    • http://lalixodurabemu.iblogger.org/songbird_christine_mcvie_piano_sheet_music.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/logitech_f710_windows_10hiva9.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/liwara/bedetifazafa.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/texas_constitutional_lien_affidavit_form.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/asmaul_husna_dan_artinya_word.pdfIn PDF document text
    • http://jilutuve.rf.gd/korogorepumuxowejusizamo.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/corporation_bylaws_template_free.pdfIn PDF document text
    • http://sovizurimi.rf.gd/free_business_proposal_template_powerpoint.pdfIn PDF document text
    • http://gawataxilonok.rf.gd/98144764007.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_off0000d772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD772 5312 bytes
SHA-256: 1ddfd3724e3f5f1d24be533019ee76082b266c46dfae381ec60ea21ea6b07309
font_01_sfnt_off0000e9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A8 10068 bytes
SHA-256: 71ddb83f930f741a6aa02f4c865f8ded7734e91bf8ce2f2407344967c60f7b35

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