Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0bf5db16f40272a…

MALICIOUS

PDF

72.9 KB Created: 2020-12-25 10:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 83ecfcd36ef549a0f43b4cbe2ea880c5 SHA-1: c877014561ec19fa215700e01440f85422ece788 SHA-256: d0bf5db16f40272ad15a254febc5113fdb1099e59c69e5114502306ad7320b52
194 Risk Score

Malware Insights

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

The PDF contains a link disguised with a lure about age and grade, which redirects to a known malicious URL. This indicates a phishing attempt designed to trick users into visiting a compromised site. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://traffmen.ru/123?utm_term=how+old+are+u+in+6th+grade+usa In PDF document text
    • https://cdn.sqhk.co/nosuterib/dRigtzh/27154169690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381291/normal_5f8caf17838e0.pdfIn PDF document text
    • https://cdn.sqhk.co/nerenina/R2EAGNR/ice_cream_van_songs_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/jTggidp/lenovo_yoga_730-_13ikb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0526c17-e65a-469a-9fd4-692a494219c4/memori_cinta_suraya_full_episode_71.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/15237157232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9f77cb-8b0e-49c3-a2c5-6eb3fe8548c7/kingdom_hearts_3_treasure_chests_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/xotad.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/work_and_power_worksheet_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb08b16-32bd-4306-b407-6a8fd320ff3a/umbrella_academy_soundtrack_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd5f258d-3e81-4795-875f-2d9db8d434e5/eseniya_film_izle.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/46410703724.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/23449891362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/820e67d6-a2b8-493f-b586-f1044dfaf212/chicken_genetics_gizmo_answers_key.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_off0000df44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF44 5292 bytes
SHA-256: 6cb66e6bce45040fb98a768368b1d74da8a0251ae8190a21e17ca2edbccdf124
font_01_sfnt_off0000f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF149 11036 bytes
SHA-256: 045acf2c25cbd1d40c3e032ce84f4a56bc54305b69f227757ed4e16fbdadd129