Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f20653b5c20de8…

MALICIOUS

PDF

70.3 KB Created: 2020-11-23 15:18:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d44ed94e1ffebcb57600bfd472d2f2fd SHA-1: ee2a960a37611ea1a30d7410e2e5e288c0244603 SHA-256: 82f20653b5c20de81595731b196ce89780007a3fa2268ed0304e373242250f39
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically `https://traffine.ru/123?utm_term=neopets+how+to+get+faerie+quests`. This URL is flagged as a malicious redirector, indicating a phishing or malware distribution attempt. The document body, though obfuscated, contains text related to 'Neopets' and 'faerie quests', suggesting a lure to entice users to click the malicious link. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffine.ru/123?utm_term=neopets+how+to+get+faerie+quests In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391302/normal_5fab54fb0feba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500001/normal_5fb99aa5c7006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_5f8c03d9a8418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473044/normal_5fbb72cbaf489.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/midipes/cube_world_new_classes.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/21507523684.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/84252678476.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/case_study_method_in_qualitative_research.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/capitulaciones_matrimoniales_en_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8737b0-fb7b-4a41-9208-a78f08a56c99/moxukurevu.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/zugunotogobuzuko.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/fundamental_counting_principle_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e8c9054-e7b1-4e2d-8d23-c3c9204f5e50/85355646212.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_off0000c558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC558 5092 bytes
SHA-256: 99caba4d1eeea0d0de13fbdec25beedf84e5fc99f51a89d1240f694f95587d83
font_01_sfnt_off0000d6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E3 12136 bytes
SHA-256: fabe49182f3d6d0328c646145b63e54ecf2ba500467c058c4b66908586017e36
font_02_sfnt_off0000fe73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE73 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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