Malicious PDF — malware analysis report

Static analysis result for SHA-256 d710d792a51940b9…

MALICIOUS

PDF

67.2 KB Created: 2021-01-13 00:34:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 67c57c01ce9b5ea976a9d6e715052cbd SHA-1: 77934caf4ed57dc8b3d14e670656214554358bce SHA-256: d710d792a51940b958d28b061769086eaacd834492d8050328b06f98652c948e
214 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though obfuscated, appears to be a lure related to an owner's manual, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?utm_term=toro+z480+owner%2527s+manual In PDF document text
    • https://wogifirum.weebly.com/uploads/1/3/1/0/131070377/levuxutarevudidefan.pdfIn PDF document text
    • https://nogikukejigili.weebly.com/uploads/1/3/0/8/130873965/dorijulopilusudivet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486199/normal_5fe90ac371a32.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/wakubuk.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://s3.amazonaws.com/zidosozawok/batolanofuribumametavojok.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/action_item_spreadsheet_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/71865736941.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/animales_invertebrados_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/67222657858.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/free_unzip_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/call_me_by_your_name_song.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/88539571257.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC6 5136 bytes
SHA-256: 183821afb94bd61423a84e6e41c68b124ae703d584f906c20085b43b8a7d8f47
font_01_sfnt_off0000ce35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE35 10100 bytes
SHA-256: b640a7981a7e850e3ccb34f9e513f362c9336484828ba969cd5e2bd55bb02419
font_02_sfnt_off0000f0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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