Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c0a25b139c5260…

MALICIOUS

PDF

64.1 KB Created: 2020-10-29 23:56:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: de00358cd2121ce7bce7fa49c19c582b SHA-1: 496f57cd0c2c15587acb43f159367e9a728ba69e SHA-256: 16c0a25b139c526077f6a7580c6745ef943498d082e33585c76330f01df80c64
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs that point to a redirector service, identified by heuristics as malicious and an SEO-based lure. The document body, though heavily obfuscated, contains text fragments and URLs that align with the heuristic findings, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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?keyword=linksys+wmp54g+driver+windows+xp In PDF document text
    • https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/gunina.pdfIn PDF document text
    • https://jafumusatezod.weebly.com/uploads/1/3/4/4/134485233/c113c.pdfIn PDF document text
    • https://nuzaguwimera.weebly.com/uploads/1/3/4/4/134492670/2955088.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/29300134054.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/poliarteritis_nodosa_infantil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/142f98a1-cf4e-478d-9440-f2f8eb4d92e7/6347731350.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/mavic_pro_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/fumusasisobomafepone.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/sivapasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b614211-3507-40a8-ab88-4a14eb22b7a3/feguxuwuwigutebazokebo.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/80516168514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd582594-8998-4974-9826-8407e20ad4df/difosodamonubizerot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b7f016f-e8c7-4a53-aa42-06f6874afbad/81508999004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd5615b-466d-4cbe-a1ea-b53799f41d9f/84398972113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/893bf584-820b-469e-ae47-c160bb3ef8d6/bonus_winamax_1er_depot.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_off0000bbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCE 5576 bytes
SHA-256: 5617ad4190bdce70d35297191599397c89ae36a09c6ebe1910d28fcd7eb0c585
font_01_sfnt_off0000cee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE7 10680 bytes
SHA-256: 1de9b7e8e47b28ec7f183a0ef87ef87fc19643d1deb55c60ebcb8c4a3ddd81a6

Open this report in the interactive analyzer, or submit your own file for analysis.