Malicious PDF — malware analysis report

Static analysis result for SHA-256 af820458970773ef…

MALICIOUS

PDF

81.4 KB Created: 2021-01-03 03:27:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8b46f5ee6157c2284ca5b7e7868efa17 SHA-1: ea3d6ee74887a4b2996c27c835a9298c9d389aa8 SHA-256: af820458970773ef8098714b2ab93b5c735aa8b3342e0e82595b243988aef19d
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 as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to 'traffking.ru', suggests a phishing or link-farming operation. Although no scripts were directly extracted, the PDF structure and heuristic firings point towards a malicious document designed to trick users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/aws?utm_term=sales+representative+contract+pdf PDF link annotation
    • https://purusoze.weebly.com/uploads/1/3/4/4/134495244/5997568.pdfIn PDF document text
    • https://cdn.sqhk.co/fekesolip/9ggjiEO/71644228780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473954/normal_5fb033879ab52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f8ff45df0e7d.pdfIn PDF document text
    • https://nixoferijoxe.weebly.com/uploads/1/3/4/3/134373865/7774229.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416806/normal_5fccd5f1ded35.pdfIn PDF document text
    • https://cdn.sqhk.co/majatuto/jdihYfm/76260468166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5fa8505e6fb7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f8bf4aeeee05.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/nisiwanolom/ireport_5._6._0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29ea7c37-47ee-405f-9193-dff1e5e8733d/87703724084.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/minukeporonilajim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9af0e73-fedf-409f-9f62-1ab396f9b765/fafepegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37dfae40-dbb7-4974-a29f-1c0e138031fd/how_to_kill_small_trees_and_bushes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df09583f-1f5f-4a9a-a6ee-4338519c55c6/hello_siri_how_are_you_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d25d8ced-bf1b-41bb-a2a9-485c8020507f/runnings_hours_dickinson_nd.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BE 3348 bytes
SHA-256: 72d970ce1b73605483a088659ebb325b929dd1ef40dd81d64cb19bec0919e052
font_01_sfnt_off0000f3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CC 5100 bytes
SHA-256: ac027e6be3b98d07ceb5d0a1e1c6b589acbd46d3b6992239898e56f09948f1cd
font_02_sfnt_off0001051f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051F 10700 bytes
SHA-256: 79ad9fcb2726375856d8ded17144e2522bbd68b01955c06e2fb87e999e55e52b
font_03_sfnt_off000129b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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