Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5150eb48c08c50c…

MALICIOUS

PDF

71.7 KB Created: 2021-03-07 17:58:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c34aec3ec449290868851b9e26ce4148 SHA-1: b363012e326192a54edb3315fd68037639d2b5d2 SHA-256: e5150eb48c08c50c4c9049996ccfacd5524d1cc36f5c47d9b1c5df6c7c978bf0
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable domains and potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The ML classifier strongly flagged this PDF as malicious, suggesting it's part of a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://gimoguvi.ru/wix?keyword=folland+real+analysis+pdf PDF link annotation
    • http://businesslinecenter.com/getaway_high_speed_2_pinball_manual7loqj.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/lamugutibuzusevos.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/Kdgjjdp/66123669442.pdfIn PDF document text
    • https://rojanekawuveruj.weebly.com/uploads/1/3/1/3/131380666/4595497.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/jdAERk6/basketball_stars_perfect_shot_ios.pdfIn PDF document text
    • https://kuludiliwalu.weebly.com/uploads/1/3/4/4/134484861/mamugutog.pdfIn PDF document text
    • http://reduslimitaly-official.site/how_to_replace_wick_on_a_kerosene_heaterefx52.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/BbgjiJX/170110408.pdfIn PDF document text
    • http://sasejemorukef.22web.org/bolens_riding_mower_air_filter.pdfIn PDF document text
    • http://ompala.store/7588135344h98ep.pdfIn PDF document text
    • https://kaposabebozof.weebly.com/uploads/1/3/4/4/134466843/8623746.pdfIn PDF document text
    • https://cdn.sqhk.co/milatepoz/Uhjibih/abalone_cove_reserve.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/gcjcc3p/80880500906.pdfIn PDF document text
    • https://cdn.sqhk.co/tatudawo/eggiije/magic_snake_cube_instruction_ball.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/gjUJSig/men_s_color_block_denim_jacket.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sijadogif.atwebpages.com/calories_in_arbys_roast_beef_gyro.pdfIn PDF document text
    • http://bejanifezilo.atwebpages.com/would_you_rather_questions_for_guys_flirty.pdfIn PDF document text
    • http://fisolimemokuwo.rf.gd/craig_capurso_30_days_out_free.pdfIn PDF document text
    • http://tanonarimunal.myartsonline.com/stihl_lawn_mower_comparison.pdfIn PDF document text
    • http://biwosagamivi.myartsonline.com/61458649248.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_off0000dd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD76 5092 bytes
SHA-256: 17eb67424d37b6de3f6a453f24eea993b71718c3de39be79c9083f9e0987b09a
font_01_sfnt_off0000eee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE3 10228 bytes
SHA-256: c2430fb01fdf943300e4ad8f9303660698a2bb7814b8bd9ecaa13a7405876c43

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