Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e449f8566b66440…

MALICIOUS

PDF

67.0 KB Created: 2021-01-07 03:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3474787bc7bce5f4ae6f7da70e3a0446 SHA-1: 830cefdc456c71fcc8e66ddb44240a3f142766df SHA-256: 7e449f8566b66440bffd73a1b4478b9be49781ededebd14b8e489c47e7c8273a
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The ML classifier and ClamAV also strongly indicated maliciousness. The embedded URLs suggest an attempt to lure the user to external sites, likely for phishing or further malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=income+elasticity+of+demand+calculator
    • https://suvosimi.weebly.com/uploads/1/3/4/6/134688706/6579388.pdf
    • https://cdn.sqhk.co/vipujitebiki/fmhihj3/66474027490.pdf
    • https://wowavimisaken.weebly.com/uploads/1/3/0/8/130814021/85f64c.pdf
    • https://static.s123-cdn-static.com/uploads/4474722/normal_5fc7cd3221401.pdf
    • https://cdn.sqhk.co/tesinogopano/hPchija/ho_slot_cars_mega_g.pdf
    • https://werijininen.weebly.com/uploads/1/3/4/6/134635560/1739593.pdf
    • https://kizozejibudi.weebly.com/uploads/1/3/4/4/134460324/fofopimiguzosasog.pdf
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/pebubixategate-berivilosevatu-mipemapej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jijari/kaxemediziwopoxu.pdf
    • https://s3.amazonaws.com/xarojapi/java_properties_file_number_format.pdf
    • https://s3.amazonaws.com/legipalofi/jowupelelixovoguresizoni.pdf
    • https://s3.amazonaws.com/wujodibu/31923579278.pdf
    • https://s3.amazonaws.com/kisimujuk/sekezuvub.pdf
    • https://s3.amazonaws.com/napoledunadigo/west_point_bridge_design_2014.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_off0000cb5f.bin
e2c565062cb5580658ca25a689f3f1610986aad1c2a6cea6bee10e419896022a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5F 5204 bytes
font_01_sfnt_off0000dd07.bin
001955eba07f4dbdf656a15c7d1633fe1b2ad1c6fb35b6fc0ca0379d785e9e00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD07 9964 bytes

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