Malicious PDF — malware analysis report

Static analysis result for SHA-256 d094812508c0a4f4…

MALICIOUS

PDF

83.0 KB Created: 2021-03-01 21:57:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8d29fc841f3ea451bc6084c27998c1f3 SHA-1: 8030f00f9944f013bce51cf785f859d0f4c069e8 SHA-256: d094812508c0a4f44472706fc01f59bf4c6c5ba34a09692681c963dc8b247863
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://resalured.ru/strik?utm_term=simulacro+distrital+de+evacuaci%25C3%25B3n+2019+idiger PDF link annotation
    • https://weroxodadugofu.weebly.com/uploads/1/3/4/5/134503620/pazuzawe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446776/normal_5ff22dc0dbaa6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385012/normal_5ffb305dc5cf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367622/normal_5fcafbeaf0bd8.pdfIn PDF document text
    • http://kojewotezigu.iblogger.org/35828731177.pdfIn PDF document text
    • https://zoguripan.weebly.com/uploads/1/3/1/0/131070442/1941979.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500417/normal_5fecbc7a72d88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bexalawisilinot.epizy.com/adolescence_medley_drakorindo.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/airmore_for_windows_10.pdfIn PDF document text
    • http://gowofar.rf.gd/the_blind_side_vietsub.pdfIn PDF document text
    • http://vimevuda.rf.gd/mebuw.pdfIn PDF document text
    • http://rovatidakenaj.rf.gd/positive_words_that_start_with_s_in_spanish.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E5 6040 bytes
SHA-256: a5ecbee019cc39beb7f08d0cf75a1b0834baa37757c8c9288e5fa36dc9a5dea5
font_01_sfnt_off00011522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11522 12328 bytes
SHA-256: 2903e834f4008dec6bbae5d59a896a576168878c109e2e2919360c9cd4df7846

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