Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b660d7fc529c0e2…

MALICIOUS

PDF

74.1 KB Created: 2021-01-04 17:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 69bc34804cad4e82456cea000900df76 SHA-1: 63415dc02068d349f0296dd00281f18894997117 SHA-256: 1b660d7fc529c0e250cc9479be3529c561268bdefb18ad55d9c3d849f22dba7f
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The embedded links, such as 'https://cctraff.ru/aws?utm_term=bokken+kata+pdf', are designed to lead users to potentially harmful sites. The presence of numerous external PDF links further suggests a link farm or phishing attempt, aiming to obscure the true destination or distribute further malicious content.

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://cctraff.ru/aws?utm_term=bokken+kata+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4384149/normal_5fcbaa57066c1.pdfIn PDF document text
    • https://gizituxozofu.weebly.com/uploads/1/3/5/3/135303534/wapuvatomizutugip.pdfIn PDF document text
    • https://cdn.sqhk.co/duxajoje/gcxiahe/build_stunt_track_racer.pdfIn PDF document text
    • https://tunefanixeso.weebly.com/uploads/1/3/4/7/134733210/3902809.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/aVSkhhk/54137829064.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/dD5qdhj/81001796082.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/VNOCJih/vonepetiguzopenolelafibu.pdfIn PDF document text
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/d060be51d5c47c.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/dqVgehb/13502716474.pdfIn PDF document text
    • https://cdn.sqhk.co/karapazepot/eibharH/luzosakibuvosixubumofufu.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/gebaxovudofe/karikebonigetofazanuta.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/kobibuvedulitaxel.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/audiobook_like_house_of_leaves.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/hunter_wheel_alignment_machine_manual.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 8

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_off0000cfc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC9 6844 bytes
SHA-256: 85a137d034e737306122775f6fcff93a7dc542f89566638d68e528e4cd9ce82e
font_01_sfnt_off0000e702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE702 4840 bytes
SHA-256: a2dc0016ff3f086626b574cfd59fc282d2e2c593e1a83a9cd02e1cecad77f32b
font_02_sfnt_off0000f79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79B 10580 bytes
SHA-256: a42264e32a292bf30f1e0d75f5699fbd031700953ec43c7936ee275aec0d7556

Open this report in the interactive analyzer, or submit your own file for analysis.