Malicious PDF — malware analysis report

Static analysis result for SHA-256 83986048d159c5d2…

MALICIOUS

PDF

70.5 KB Created: 2021-01-04 01:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c38182c97f60fbb1eb112efc7c84ef0a SHA-1: ec1eda22227bf58158c3709ed18ef52525a067c4 SHA-256: 83986048d159c5d27a566cb555a6424bda280e39baa7431fb50dcd0d749835b7
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a link farm with numerous external URLs, suggesting an attempt to direct users to malicious sites or download further payloads. The presence of a call-to-action phrase further supports a phishing or social engineering motive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/aws?utm_term=free++total+audio+converter+for+pc PDF link annotation
    • https://dujeranisijoku.weebly.com/uploads/1/3/0/7/130776063/burizodono.pdfIn PDF document text
    • https://nibuwoxemunovox.weebly.com/uploads/1/3/4/7/134714338/4e90f86a22d78.pdfIn PDF document text
    • https://vejefoxebeses.weebly.com/uploads/1/3/4/8/134860837/fusufog.pdfIn PDF document text
    • https://zorusijumabek.weebly.com/uploads/1/3/4/8/134851431/463b66567fa2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0566530a-390a-4275-9806-bc39d0cf4e9c/nunasepodut.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/69004542541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e91739cd-c49d-4a4c-9dfe-f39f918e2975/gumimepebusov.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/67243002889.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/elks_club_mechanicsburg_pa.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/furanulajiruxomet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/726dc168-8628-472a-ae79-022d92a3df11/86441995572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abac633c-5855-410e-bf25-474d2dc15091/86351898892.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/gegefejananetotemanekaxaj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD861 4988 bytes
SHA-256: d6564a778184c400826a4c259157e007b7a37715cd440480b851ffeae16ec7aa
font_01_sfnt_off0000e975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE975 10632 bytes
SHA-256: 3ee6b49cb59c9dc1c977d33763cfffca107089de3d72378881d4d4a6732a0f6d

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