Malicious PDF — malware analysis report

Static analysis result for SHA-256 d981ce044414a040…

MALICIOUS

PDF

78.1 KB Created: 2020-11-27 18:59:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 486eb8dc8bf16bc6a763014d18d70bce SHA-1: 183532b4ac5f4fc6d5d355c6b721565a372227da SHA-256: d981ce044414a040bacebff547f7c2d3d09d81b6ee376c1d58753ca5307e0245
214 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://traffine.ru/strik?utm_term=heat+and+mass+transfer+solutions+manual+cengel+4th', is presented in a context that suggests it is a link to a technical manual, likely a lure. The file also contains a mass external PDF link farm, further supporting a malicious intent to redirect users to potentially harmful sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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://traffine.ru/strik?utm_term=heat+and+mass+transfer+solutions+manual+cengel+4th In PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/jexelubikegige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376382/normal_5f8a14b5a9089.pdfIn PDF document text
    • https://wilunozuwi.weebly.com/uploads/1/3/4/4/134432110/3941521.pdfIn PDF document text
    • https://jurarolo.weebly.com/uploads/1/3/4/3/134351512/guxuxumif.pdfIn PDF document text
    • https://pizijejubuga.weebly.com/uploads/1/3/4/8/134883891/wavelaj-bolifavupanaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/233bdc56-21c9-4190-a70e-447113d82fb7/88215388561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f36a2a41-0492-42ee-8fe7-89e7579b083a/3993524001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35b2bb82-a05d-4d74-85d2-9022a3620ac4/dubevotuvuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20fafc66-645b-4e80-91ac-b39a98cbe73e/hd_1080p_vehicle_dvr_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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D3 11008 bytes
SHA-256: a99943f4a52c6f0bffcc2a1ef9d49962a3b43eb48868516958615bc1c2809ad6
font_01_sfnt_off0000e689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE689 5368 bytes
SHA-256: 57fabbd1dfd5d991f524e30bf1b0c60b74221bf602c9e19e3fb1c6db44ecd8ba
font_02_sfnt_off0000f89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89D 10904 bytes
SHA-256: e67d4f7f69b975677d9bf23286269d066ed19933b2523c32d5f3cf912a392aac
font_03_sfnt_off00011d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D00 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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