Malicious PDF — malware analysis report

Static analysis result for SHA-256 450c475fd8252674…

MALICIOUS

PDF

62.9 KB Created: 2020-11-16 15:20:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b2c2a2f0641d005bbb2990b755084c61 SHA-1: 9e31a3f280100f32f59ad24b0f29f782ebdc3be2 SHA-256: 450c475fd8252674dd17a4e5d86c03787829da21a08083b1f180b08a6b62d987
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to a suspicious URL. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection further support the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/123?utm_term=middle+georgia+resa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f8b7c35e0802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408460/normal_5f9d4ad31a2f1.pdfIn PDF document text
    • https://dovogejeromew.weebly.com/uploads/1/3/4/6/134666082/kikof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5f989562ab098.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f9cdcece3d6f.pdfIn PDF document text
    • https://mesovozilepako.weebly.com/uploads/1/3/4/5/134588792/mumiveviru.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/sukobogixe/34767322865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ece5386b-d9c0-4747-be3c-a734f17a851e/zigetobekekigofa.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/words_that_starts_with_r.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/free_video_player_for_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/general_formula_of_math.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/77145977869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1adba0-c62d-446d-8ad2-5d06c52c9035/rubatosijanuzefugibuje.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/babaxajezijajugegug.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 8

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_off0000b940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB940 5000 bytes
SHA-256: f39f17c829d498f769043fb7d302ec589d55b4502332df8dba3dadb6164efa7f
font_01_sfnt_off0000ca56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA56 11100 bytes
SHA-256: e8cb5f86e63108a1bbc92340a44d7efd2c29840f07525a30478eaa24d8fd8092

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