Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ca386fa9062ae2…

MALICIOUS

PDF

67.8 KB Created: 2020-11-14 01:55:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c77a17be54cdd2b4b9f9bc7320b61db8 SHA-1: 7ab83a6bf5b5ad6e4e5f2ae99a5a8a4c66f6ae22 SHA-256: d2ca386fa9062ae236be4546a8cca525540034d5746ade40ac882144b3d19c38
194 Risk Score

Malware Insights

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

This PDF file contains a lure referencing fishing reports, which is designed to entice users to click on a link. The link redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ggtraff.ru/aws?utm_term=nor%2527+east+saltwater+fishing+reports In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415740/normal_5faa5a1974954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386354/normal_5f94946f286c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379844/normal_5f9b5cfc075f8.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/zivavo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/moduxanakuri/ap_chemistry_zumdahl_10th_edition_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9206e6d-22a3-4409-a953-156032c8158a/girlfriends_guide_to_dating.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/broadsheet_brisbane_lunch.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/black_messenger_2019_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8aabf2e-3857-484a-9c60-f2ac58b1ff40/86085200351.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A1 5048 bytes
SHA-256: 1624b0c608c46278704c0bc38fc5de701f5a6ff544faeff15eb82b42837b7a94
font_01_sfnt_off0000d3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DA 9564 bytes
SHA-256: e6b2ec6482465812b06a8409071dd7e81fbb075e1cbb3491cce70364b4857cc8
font_02_sfnt_off0000f488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF488 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3