Malicious PDF — malware analysis report

Static analysis result for SHA-256 38bf76a869a2eefc…

MALICIOUS

PDF

66.4 KB Created: 2020-12-05 00:20:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1391fa4d29d2a52835ec4b6df51f771e SHA-1: 3fb60e5138ca961f86ab293cb79a6c7ff5fedde2 SHA-256: 38bf76a869a2eefc91a57a2d1cc7e748216fa29d03c218fa279ac64036c404e0
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. Heuristics indicate a link farm and a phishing/trojan detection by ClamAV. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://traffking.ru/123?utm_term=pit+bike+engine+mount+bolts In PDF document text
    • https://popibixa.weebly.com/uploads/1/3/4/7/134745137/novasap_weted_fudesidu.pdfIn PDF document text
    • https://nitetemefugek.weebly.com/uploads/1/3/4/7/134772401/1808579.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/5fc1380dc6d9645836244656/t/5fc852ad094cf7617dbd2cec/1606963886945/witcher_3_glyph_crafting_diagrams.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4ada51c-f48b-461c-bad4-11ca6f2b0d6f/sofikeseranamu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f09fe2fce462bc994906/t/5fc57ae9f3de5e49b51fb096/1606777577982/cuerpo_sano_mente_sana_capitulo_7_exam_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/281fa7e8-1708-40c0-8fa6-7f31ae549fc6/factory_balls_2_unblocked_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a45020-a2de-412f-ad6a-424a4ad2ec13/87207476774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b168aa9e-ee38-4f1c-aebf-8d2875f7355a/limited_brands_aces_etm_scheduling_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7246a8ad-9515-4315-a931-b5ee0d3a0521/94160189616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7953e16b-0e50-4421-b9d1-8729bb355dbf/macroeconomics_graphs_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f81bea65-1ab4-4446-b47a-435979402586/79228478447.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf531fe6d49a06bb88a6c4/1606374176864/2012_sea_doo_challenger_180_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9742fc72-29bc-4c0f-8625-2c0c14d91320/bidolovewupitili.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58302c6d9645836414f06/t/5fc66e2de6d49a06bb704079/1606839854975/speed_boat_wallpaper_hd.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_off0000c9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F1 4904 bytes
SHA-256: 3afdc661ae62c50fca6dbd85cf2a995e49198adef985e94a17b0ed78fbfc2e26
font_01_sfnt_off0000daa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA1 10148 bytes
SHA-256: 83cb0f3d7c1f051515200d638b87b30280f5a35efedb8a38c23ed53f53492b5c

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