Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb087f389f3e506…

MALICIOUS

PDF

65.4 KB Created: 2020-11-14 05:30:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ae3dffb0a05825fde84d86fea31d4295 SHA-1: 1d26078b7b9b0b645eac1b234bb6473971ae816f SHA-256: 8fb087f389f3e5068c286d2c473549bcc9ede52d2fa0a34f3c48476da8692cec
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the PDF structure suggest an attempt to direct users to external, potentially harmful, sites.

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://traffine.ru/123?utm_term=mario+64+apk+uptodown In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445115/normal_5fa64cf8c67d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479684/normal_5fabfc4b98881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425913/normal_5f9d4297bba89.pdfIn PDF document text
    • https://joxetoxuluf.weebly.com/uploads/1/3/4/3/134391367/6854572.pdfIn PDF document text
    • https://fadevigobawu.weebly.com/uploads/1/3/4/3/134346767/ec0ab983db70d.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/bokofapig/84540102964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9cdc5ba-7436-4725-b9ca-6b2e97cb1543/social_policy_personal_statement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f36a8c-0ba0-4954-88be-608b66460366/suxoxokalavuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd65007-f35a-424c-90e3-7fa353c06377/kazalejegogakepijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1424a29-05f8-4cbe-9291-3488cd2befb3/riptide_sheet_music_flute.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/xugukalegegal.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_off0000b7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A0 4912 bytes
SHA-256: b0a340a56a0322319f5a69fd61a4ddfdbd814791a1f155672423162e1021c38d
font_01_sfnt_off0000c871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC871 10036 bytes
SHA-256: c2e6d668677825db9077b7f7ef779483cb881076021f076dd107911c0aac02b6
font_02_sfnt_off0000eac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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