Malicious PDF — malware analysis report

Static analysis result for SHA-256 3614308a5a833a01…

MALICIOUS

PDF

81.3 KB Created: 2021-02-23 07:27:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f252bbda0e4fdd6ea53b617bd536f37f SHA-1: 0489b83beb58777d2476d080e205ce4831c41cec SHA-256: 3614308a5a833a019740798088e083aa9fdd95eb4df210926dcee9e49c7bb5a1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO spamming tactic. The embedded URLs likely lead to malicious content or phishing pages.

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
  • 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.
  • 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://crophysi.ru/strik?utm_term=lost+stars+main+characters PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454179/normal_601781aaed5d7.pdfIn PDF document text
    • https://vavaxomutiposev.weebly.com/uploads/1/3/0/7/130738712/9652796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446924/normal_603063fa4eb98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496582/normal_6003670f7c29e.pdfIn PDF document text
    • https://famotufenimuz.weebly.com/uploads/1/3/4/1/134132127/mepijubasuxuj.pdfIn PDF document text
    • http://tuxodoj.22web.org/overview_of_codex_alimentarius_commission.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413977/normal_6016b45a9af93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465128/normal_5fdd3efe3b316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503584/normal_5fe988ec9dec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411270/normal_6010131712f76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502870/normal_60057519bd5b0.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
    • http://businewon.rf.gd/88619196638.pdfIn PDF document text
    • http://luvotirapanuza.rf.gd/bigamukamuxoninapox.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_off0000f3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CA 4736 bytes
SHA-256: 218e8ccd107540cd7327fcb9575d0a53f8f72fbfc8c1f549a8c944067d5d2bb2
font_01_sfnt_off000103a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A2 11408 bytes
SHA-256: a433a141203f33f86004c66ff487b4086d303434363ef8df7b6f66fd6e26bd0d
font_02_sfnt_off00012a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A79 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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