Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61b578af79fab69…

MALICIOUS

PDF

67.4 KB Created: 2020-12-24 01:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9969397908e2ac65c6e933fa2145d871 SHA-1: bfcee1944e8f36778aa90c2019f96a5c7ccfba03 SHA-256: d61b578af79fab69174071c3127205e58d2d1f789e0bda86828c6b8201ce3f31
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites designed to host further malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one URL leads to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

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.
  • 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.
  • 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://traffmen.ru/strik?utm_term=ice+cream+shop+open+near+me In PDF document text
    • https://zorisurirumu.weebly.com/uploads/1/3/4/6/134600588/suvaxiwoji.pdfIn PDF document text
    • https://gizalikujaxemif.weebly.com/uploads/1/3/4/6/134606641/wobufolujabiv-zupekerazijilig.pdfIn PDF document text
    • https://vexalujonesudu.weebly.com/uploads/1/3/4/7/134738084/guxuruko-semija-xevuv-bedoruz.pdfIn PDF document text
    • https://tizitumobupo.weebly.com/uploads/1/3/4/9/134904485/nojimaka-pusoxekov-namigasipe.pdfIn PDF document text
    • https://reborugavuzak.weebly.com/uploads/1/3/4/7/134736286/f95014381bc2ee7.pdfIn PDF document text
    • https://nojijakifon.weebly.com/uploads/1/3/4/0/134012839/2616622.pdfIn PDF document text
    • https://pajujetijawu.weebly.com/uploads/1/3/4/3/134334360/4075407.pdfIn PDF document text
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/famewu.pdfIn PDF document text
    • https://ludodufapagita.weebly.com/uploads/1/3/4/6/134616483/luxutirupov.pdfIn PDF document text
    • https://dudakodut.weebly.com/uploads/1/3/4/4/134497067/tezosede.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/juvuraguvutoxif/91847874046.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/32662115422.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/sharif_badmash_film_song.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/bhaagamathie_telugu_full_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/chura_liya_hai_tumne_song_likewap.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_off0000cdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBF 5076 bytes
SHA-256: ab1ebc47b54d86d6b5f780924afe5a451444ccdc08a37a865f3c1abbfd5be419
font_01_sfnt_off0000ded4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED4 10044 bytes
SHA-256: 3f412441dca55b41bc507f8c11c9103894e9a0d097d906e9083d31d1ef5990d3

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