Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2cd33f083d7f36…

MALICIOUS

PDF

83.4 KB Created: 2020-11-19 01:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 482e7bb36c4729a678aa14d387c3531d SHA-1: 757bfc8abfdc0193efa53f56fc952b6bc269b9df SHA-256: 5d2cd33f083d7f36135f1b70a882f132f0aef88597252884d2fd568922166a24
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, directing users to potentially malicious infrastructure. The primary malicious URL observed is 'https://ggtraff.ru/strik?utm_term=influencing+people+new+vegas'. This behavior is consistent with phishing or malware distribution campaigns, where users are enticed to click on links that lead to compromised sites or exploit kits. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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
  • 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://ggtraff.ru/strik?utm_term=influencing+people+new+vegas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420905/normal_5f9847aab4c10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5f94d82d9ed0b.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/lalulelav-fuvebipepafufa-bijuvakobamijiw-kaxuxofexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375352/normal_5f990035eeceb.pdfIn PDF document text
    • https://fexatawolev.weebly.com/uploads/1/3/4/4/134445796/1229216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383156/normal_5fb35c20f29d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f9ad2be6cb1d.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/07a53bd9-b08d-4150-b5e4-564a0467aaa1/66399928670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5984fe4-885a-4254-978b-8a45bb535a2e/86462522354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75d9efb2-1580-4618-b087-0eb1fc05ba4c/vagetilex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee332fa5-081d-470c-95ee-20532dfd9c3f/golatapuzomudewebon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4a54e0f-6cd3-4e64-bb16-3f6f621d5632/xipanupuguzajax.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_off0000fc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC11 4976 bytes
SHA-256: ff266d0239cca9e1f021689cd7eb6ef77528c570378545b86ccf92a044f3da17
font_01_sfnt_off00010d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D21 11136 bytes
SHA-256: ff4cff12ae2a59205d5d2d162ab4477e9c5f4ca00c08529b75601767dbcbb933
font_02_sfnt_off000132fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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