Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c9e924bf188b4f…

MALICIOUS

PDF

77.1 KB Created: 2020-12-29 12:47:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0081ff51a6be9fcb6f8bccbefb7dd5ce SHA-1: ed45205b7d82e58b2ff6ae7e268760a248e4d91a SHA-256: 88c9e924bf188b4f3853bbdd80819a23ed6a123e19f2f21937303523f14fe3b3
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, identified as a link farm and a malicious redirector. The primary link directs to 'traffking.ru', which is flagged as malicious. This suggests the document's purpose is to redirect users to potentially harmful content or facilitate further malicious activity. No scripts were extracted, but the PDF structure itself is indicative of a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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/strik?utm_term=ibis+paint+x+online+unblocked In PDF document text
    • https://jositaloj.weebly.com/uploads/1/3/4/0/134042718/nesod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407749/normal_5fa605ce62593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386828/normal_5fb83d269d532.pdfIn PDF document text
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/7090301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412575/normal_5fa1630dd0c9e.pdfIn PDF document text
    • https://lazumuron.weebly.com/uploads/1/3/4/8/134863931/beninukokonum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411917/normal_5fda941e73d40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_5fe9c45813b39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482009/normal_5fce33db96e41.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://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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B0 5064 bytes
SHA-256: 8fcb6de5dcd253b8abf624cf856af7f76558f62941eef833b138a4397a69ff15
font_01_sfnt_off0000e1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E7 10016 bytes
SHA-256: f4e0a9262061fb4563a105f1b0eec45dae00b7d9217e20891460c93857c125c4
font_02_sfnt_off0001047a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047A 16084 bytes
SHA-256: 40362fbc9d771ad4ffebf23d851d0e608cbe5e910bc9c9578be8a04431091e8d
font_03_sfnt_off00011927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11927 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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