Malicious PDF — malware analysis report

Static analysis result for SHA-256 838ecf041359b473…

MALICIOUS

PDF

80.7 KB Created: 2020-11-16 19:54:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2636e47358967acb67ef79086c57fe0e SHA-1: e7a3c61f39887f3355cbdbf7baba1db83079d278 SHA-256: 838ecf041359b4735089061f5aaf346e6b2259c21202a2512b3f3afa7879a9b1
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a pattern of linking to potentially harmful or spam-related content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/strik?utm_term=resident+evil+confidential+report
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/dokugepofajexazeg.pdf
    • https://bupifepubeweta.weebly.com/uploads/1/3/4/3/134336259/087078ff.pdf
    • https://joponavo.weebly.com/uploads/1/3/4/2/134234964/4194098.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2d00692a-41ee-4cfa-b92c-41d27ed83cf6/tazeloriguragatofo.pdf
    • https://uploads.strikinglycdn.com/files/d453e84e-204c-46f2-9cf3-557d34f049a7/dugegatom.pdf
    • https://uploads.strikinglycdn.com/files/e09b488a-eb94-4151-bdc1-0c9c1c329534/wevojeponujatokuzenob.pdf
    • https://uploads.strikinglycdn.com/files/e5a9526b-ed7a-49ef-bb3b-67e4529264d0/57136243425.pdf
    • https://uploads.strikinglycdn.com/files/136146ff-773d-432a-9a1e-f78b887a7e43/35809339804.pdf
    • https://s3.amazonaws.com/vinivuxo/avalon_nail_salon_dulles_mall.pdf
    • https://uploads.strikinglycdn.com/files/29883462-1fdb-4b3c-b57a-ccef68afe518/berliner_platz_1_neu_answers.pdf
    • https://s3.amazonaws.com/dazifozixawus/jelobofitatemufunanipide.pdf
    • https://uploads.strikinglycdn.com/files/a92cb980-8894-448c-afa5-5ab3b44216de/tuvirirejefelefojijebuv.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_off0001001d.bin
514f844a8492562bced96701f52982433daee041e20caaadb102251da145e628		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1001D 5216 bytes
font_01_sfnt_off000111f9.bin
4667164cbbb5920b35c0badeee8d1dc1969389f6516428038070ee40ef20efb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111F9 10488 bytes

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