Malicious PDF — malware analysis report

Static analysis result for SHA-256 612ddfcd7f584c2b…

MALICIOUS

PDF

66.5 KB Created: 2020-11-19 21:17:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 47f1a6e1b5257c659c41a11ce566447e SHA-1: 8aa42aff8a4f1201cc643a1bc2732ab9771428e3 SHA-256: 612ddfcd7f584c2b1b462aae616cb48730b942a63cd2751cbe4ccfdd1640960d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, including one to 'trafficel.ru', suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links point towards a social engineering attack designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/123?utm_term=delta+airlines+company+mission+statement PDF link annotation
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/vulipatal.pdfIn PDF document text
    • https://dasateju.weebly.com/uploads/1/3/4/5/134582383/sitesijez_zelimep_gozozonemole_kujokifafeb.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/minozudir.pdfIn PDF document text
    • https://supixevobaje.weebly.com/uploads/1/3/4/3/134356264/f2eaa6225cc.pdfIn PDF document text
    • https://sepijoverik.weebly.com/uploads/1/3/4/3/134317252/pibuputaxemoxe-pagev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mubefula/54838907746.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/44662367736.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/all_flesh_must_be_eaten_revised_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d4eaeeb-a8b8-4eca-92b1-35e37bfaffd1/27746390254.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/56093696654.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/70179493017.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/great_is_thy_faithfulness_g.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_off0000c789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC789 5180 bytes
SHA-256: 97fe9705f34bea73473e23456891e8c46af0c5098abdc78695d305dc4bc754fb
font_01_sfnt_off0000d923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD923 10644 bytes
SHA-256: 043176a3a0a516704e737df64eea4f4c8965817a97e5ad8708bd6a44c8a9a252

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