Malicious PDF — malware analysis report

Static analysis result for SHA-256 01378b38fb88721a…

MALICIOUS

PDF

61.9 KB Created: 2021-01-01 02:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15940177a07e91069fd53ef4a86ae84d SHA-1: 73fb24be83d159f63a6dad6b9758eab7131eb91a SHA-256: 01378b38fb88721a8f80f9e5b02ec5c77884a397289c0e57b79d4a79dd56c90c
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic firings indicate a high likelihood of malicious intent, specifically related to phishing and link farming. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest it's designed to lure users to malicious sites.

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://cctraff.ru/strik?utm_term=fire+and+water%2527
    • https://kojaresojew.weebly.com/uploads/1/3/4/3/134312518/surakadinido.pdf
    • https://mukozuzaze.weebly.com/uploads/1/3/4/2/134265885/siwev.pdf
    • https://pabenegoje.weebly.com/uploads/1/3/4/3/134348732/biwafejewebu-megixogovur-mabod.pdf
    • https://cdn.sqhk.co/ruxuvedije/bjcOigi/download_drift_max_world_mod_apk_rexdl.pdf
    • https://cdn.sqhk.co/zurefaxenov/idxjjge/kingdom_builders_international_ministries_lancaster_ca.pdf
    • https://kulilopoxi.weebly.com/uploads/1/3/4/3/134375859/suwizawul.pdf
    • https://munizifazu.weebly.com/uploads/1/3/4/3/134354015/tetazedi_fifuv_pafajesaloju_jidesozopupo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/migivewuwe/85809330846.pdf
    • https://s3.amazonaws.com/dujepav/14820177468.pdf
    • https://s3.amazonaws.com/welanisowari/xuxaribi.pdf
    • https://s3.amazonaws.com/wizedumi/sofonemamafelivefulo.pdf
    • https://s3.amazonaws.com/zunaduxa/83457241343.pdf
    • https://s3.amazonaws.com/xomepixo/parepipoguton.pdf
    • https://s3.amazonaws.com/lorifumofelu/monkey_go_happy_3.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_off0000ba5a.bin
bc88b725710653f68c026818c3a866456b8c5b8e5fb1fb515fe1ee68ea00668e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5A 4688 bytes
font_01_sfnt_off0000ca72.bin
0a3554893ec36019f8dfde4ca104d4efd56419de71c59e69bd554a3fa10e9a23
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA72 9592 bytes