Malicious PDF — malware analysis report

Static analysis result for SHA-256 e813374cfeabc3d6…

MALICIOUS

PDF

72.0 KB Created: 2020-12-19 15:48:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: fe2de4eb63c48e10fa115c61506bcfa9 SHA-1: ea02e54bff6326601a8a571fce57a4a474ff49b8 SHA-256: e813374cfeabc3d68cbd4f2e8b2866123ed58fa2a9b4ebc7b22cf59fd5f2e22f
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://traffine.ru/aws?utm_term=big+bang+theory+essay+pdf In PDF document text
    • https://zabodoxukuxubar.weebly.com/uploads/1/3/4/9/134904472/bukokugaxep-nizuwe-naxapugadiminus-fipejif.pdfIn PDF document text
    • https://jerexibim.weebly.com/uploads/1/3/4/6/134654770/552483.pdfIn PDF document text
    • https://fexemefamerera.weebly.com/uploads/1/3/4/2/134236105/d7bb9.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/lenazosetuva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4cb348ef7301f8b29e6b1/t/5fcea6a17bca2b4c4f2c587b/1607378593680/robot_strike_game_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/amy_schumer_documentary_pregnancy.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f5bf0a2757459be32ffe/t/5fc5db6961e25426e102df78/1606802282846/excel_2010_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/ace_academy_notes_for_gate_ece.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/psychology_unit_1_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/63135009574.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0feaf0a2757459be36412/t/5fd04b715efba8153b1fb48c/1607486321875/fast_and_furious_tokyo_drift_game_soundtrack.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1c3d140f1034a5caf136a/t/5fc83e0546ef2e08cbaeb293/1606958597730/coolmath_snake_world_record.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/98276362596.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/platform_boots_70s_fancy_dress.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/bhaktamar_stotra_marathi.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_off0000deda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDA 5564 bytes
SHA-256: 7634e809e8af8ca91840f6766c92cc545ab13165f1f6b49871da2bafb874111e
font_01_sfnt_off0000f1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C8 9844 bytes
SHA-256: 41a0f82b81a88dc31aeda6e3ba1adc670044dfb2f1c9cbb94a27f97fab257625

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