Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f0b9632016b39a…

MALICIOUS

PDF

73.5 KB Created: 2020-12-26 10:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d4496d18e1420cfe44ff165c13e70520 SHA-1: 2be2fce12186df2ab77a08ed30054c55c77c789c SHA-256: c6f0b9632016b39a0da0b1a6f228e299114ff7f91a17d29966115038542a7300
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains multiple embedded links, including one pointing to a known malicious redirector at 'https://cctraff.ru/123?utm_term=alto%2527s+mat+cutting+system+4505'. The presence of a link farm and the ML classifier's high confidence score indicate a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to contain references to 'Alto's mat cutting system 4505', suggesting a lure related to a product or service.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://cctraff.ru/123?utm_term=alto%2527s+mat+cutting+system+4505 In PDF document text
    • https://wubobuxidozexe.weebly.com/uploads/1/3/4/3/134322977/somazude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_5fd9b078a4d55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424996/normal_5fcd525a77392.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/dorobukasawituw/78316570679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/796a3171-bf26-4fce-abbb-f96c0eac5215/step2_naturally_playful_woodland_climber_stores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9c365dc-53d7-4770-af46-1f6d62df50c8/28711433860.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/kaxod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bfb61c3-b4b1-458b-a58f-aa998df73c38/what_are_the_main_text_structures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e49cbfdb-040c-4f53-999a-c81f012d5c0f/encyclopedia_brown_mysteries.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d07d80-aa49-4da9-a5b2-59558c453e48/meet_the_spartans_full_movie_download_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/5380241119.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/speech_outline_template_google_docs.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 3

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD165 5384 bytes
SHA-256: a36b91b8e3719b6cf5d96a313ae47fa6e7c85a6cb59fa45168275f3407a3b3ed
font_01_sfnt_off0000e3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9 11528 bytes
SHA-256: 00b65cc5a1fe4cf3d1899df72872413e5d96616d8c6d7e0eb67bb30dfe64f479
font_02_sfnt_off00010b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B24 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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