Malicious PDF — malware analysis report

Static analysis result for SHA-256 563e02749e65b10c…

MALICIOUS

PDF

60.1 KB Created: 2020-12-17 13:09:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69970a951ec66a435943bf78640bc1b5 SHA-1: 628c390dda98e7e61385bf1feed83264e877601b SHA-256: 563e02749e65b10cb81d43f752a091f7d414e17ccaa9a8d8ea3648636f5e1059
214 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Minecraft copy and paste text', suggesting a lure. The presence of many embedded links, including one pointing to a potentially benign S3 bucket, indicates a link farm or redirection strategy. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=minecraft+copy+and+paste+text
    • https://cdn-cms.f-static.net/uploads/4445866/normal_5fd666e32b958.pdf
    • https://fupiloxeti.weebly.com/uploads/1/3/4/3/134380404/loremexurewad.pdf
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/zofabobodukunukas.pdf
    • https://cdn-cms.f-static.net/uploads/4384482/normal_5fd83e0cd7c0c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ruzumeb/free_fashion_magazine_templates.pdf
    • https://uploads.strikinglycdn.com/files/30e0832c-eb98-4efd-b4bb-83a375781639/35158863054.pdf
    • https://s3.amazonaws.com/tapelu/migojatanotumofadi.pdf
    • https://static1.squarespace.com/static/5fc6db42504bb4653ce19d0c/t/5fc809d48f408a487d15cce1/1606945236817/basketball_local_arcade_game_uk.pdf
    • https://s3.amazonaws.com/mejediparaxi/hunter_tannersville_school_district_ny.pdf
    • https://static1.squarespace.com/static/5fc364d00a2757459bf2de76/t/5fcea3e406785e60cffd815e/1607377892626/gofedumisebafan.pdf
    • https://s3.amazonaws.com/pajukovuxetu/64124145656.pdf
    • https://uploads.strikinglycdn.com/files/70558c4c-1c69-4ee6-b280-35b0cec8e13b/zonukoxamedimaputegati.pdf
    • https://uploads.strikinglycdn.com/files/7b640149-da1b-46b0-8ece-f70cf39f09d0/53423346529.pdf
    • https://s3.amazonaws.com/fogibi/sevuraginufuzas.pdf
    • https://s3.amazonaws.com/rijaliwiguvex/savezimunakubimevapogo.pdf
    • https://uploads.strikinglycdn.com/files/fded73ad-b6f3-4fdc-ac0b-6378d6e69e46/78142878766.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b13a.bin
1d59ee0519b11a2ae91395a9692100ee7d3f51ec638183edcabf00a8ee74f233		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB13A 5292 bytes
font_01_sfnt_off0000c362.bin
e99de53a5c021712cd0e221ebe03474193c762ba9848b10f4d181590739f3a19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC362 9340 bytes

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