Malicious PDF — malware analysis report

Static analysis result for SHA-256 56596d486a338432…

MALICIOUS

PDF

67.4 KB Created: 2020-11-29 21:59:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7fff4deb87d33f3f79dd93a6181e6644 SHA-1: 1526aa5f07c87a1b4f353db1257043235c2368c2 SHA-256: 56596d486a3384321b5172f5cea27003b3624c95a62d7183f610a94462156113
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a large number of external links. One of these links, https://trafficel.ru/123?utm_term=south+park+wow+episode, is flagged as a high-risk SEO redirector, suggesting a phishing or malicious content delivery attempt. The ML classifier and ClamAV also strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • 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://trafficel.ru/123?utm_term=south+park+wow+episode PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388819/normal_5fbcbd7d6cc71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467273/normal_5fa642ccf41c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f8e64a5128fd.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/2877190.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/a56ceea6-9caa-4997-8c9c-407d5c221371/5399812384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc9ba419-a496-4e7e-b735-e13643f263d1/36548632366.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/types_of_scissors_for_sewing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85509ffd-a144-4578-8f2a-5f8a002b445a/legoland_california_map_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/fortnite_skins_free_for_minecraft_pe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d27606de-ccc6-4474-b6d7-b0a4f4115b74/fexadojipuparovef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5781c31-a315-4abc-b587-b4723e888802/new_years_eve_prayer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fdddd9c-4e05-4023-8f37-0fbf25191308/divekekamot.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB83 5276 bytes
SHA-256: ded55e24db5c096e9845f7178d432651e6d1126cf5f012c013f9da09478145c8
font_01_sfnt_off0000dd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7C 10376 bytes
SHA-256: 6d4fe10a2179e685e7dd99c9cd42dfecbf3681eb11f2e00afa519f731af33dd0

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