Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a8b5a89b3c0aff…

MALICIOUS

PDF

95.1 KB Created: 2020-11-10 20:25:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1329a302dffee43af39b0ad6b0097611 SHA-1: 3ae420b6be84fab730a0269d4e2aa29b34ee2859 SHA-256: 16a8b5a89b3c0affbc108f6fd279bc905fe54cb915373d9e9950aecfc71c2f99
214 Risk Score

Malware Insights

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

This PDF file exhibits malicious behavior by embedding numerous links, including one pointing to known malicious redirector infrastructure. The heuristic firings indicate a PDF link farm designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lead users to phishing or malware distribution 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://traffking.ru/123?keyword=oracle+inventory+user+guide+r12 In PDF document text
    • https://tudidufagul.weebly.com/uploads/1/3/4/6/134622529/daripurumigubem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_5fa21517e5140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5f87794ea20a1.pdfIn PDF document text
    • https://vafeperaj.weebly.com/uploads/1/3/4/5/134586379/3399955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f99cda6b4046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_5fa8897be7a8c.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/b9b62e.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/9543927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5fa88f9a9f7a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f884ffebe717.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://uploads.strikinglycdn.com/files/a93c8ba5-0116-4eb7-bed0-b75ee0d37cfe/61090911642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bce4677b-43a2-41be-81f5-313ca15cd665/ghost_recon_wildlands_koop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f18959e4-15bb-40d0-8e97-556c256cc3f5/62917727151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da43b983-93f6-4b5d-9f86-eb74f5e5130c/bejafazuravot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9435463d-8266-4ee2-9fe9-48f8b08b0c89/xoniworulokexip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f6aa6fc-b3e5-4c87-b904-d6291fe49d4b/borderlands_2_haiku_hitman_challenge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d38ffe-ef58-4c5f-ae33-ccfb19cbeef7/37639038609.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_off000128a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A1 5364 bytes
SHA-256: 6aaf998ad051194498e0118c413917e8816c8d3b760df39d949eab5d20a755a1
font_01_sfnt_off00013af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF8 11016 bytes
SHA-256: e036ef6042db20a223d023f55a7e1d29f655858a3652194d18623b95bd59cfc1
font_02_sfnt_off0001607f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1607F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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