Malicious PDF — malware analysis report

Static analysis result for SHA-256 484214780f73e6db…

MALICIOUS

PDF

72.1 KB Created: 2020-11-10 16:39:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: eb7fda9b008c25b74a63811bec46f69b SHA-1: e997625b68943d6cde0608d1e2f30cd9748a5365 SHA-256: 484214780f73e6db101b6ca909f1fb156935bf1f6027442dbb4178b114ff61fb
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a redirector link and a PDF link farm. The embedded URLs, particularly 'https://ggtraff.ru/123?keyword=watch+the+wolf+of+wall+street+online', suggest a phishing or malware distribution attempt. The presence of a link farm indicates an effort to disguise malicious content among seemingly legitimate links, likely to evade detection or to increase the reach of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • 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.
  • 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/123?keyword=watch+the+wolf+of+wall+street+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4422622/normal_5fa63e0a2814f.pdfIn PDF document text
    • https://raxuzorufureraw.weebly.com/uploads/1/3/0/7/130775378/jejuzatixojagi_mirag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408864/normal_5f99a18296cce.pdfIn PDF document text
    • https://nirorozarijax.weebly.com/uploads/1/3/4/3/134342495/af21e37b.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/rimepusox/king_arthur_script.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/943252923.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/34419963555.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/luwususa.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/combo_heat_press_machine_user_s_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC750 5076 bytes
SHA-256: 549af3c9db35bd625921ed8c58a373e28172580d88ab76bcd4793a6ac4ee5d6d
font_01_sfnt_off0000d8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A8 11496 bytes
SHA-256: 0c5788ac3fd0899a77d0494402595dc0d1eccd59ea327e728960d99a1a397ed5
font_02_sfnt_off0000fede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDE 16144 bytes
SHA-256: f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d

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