Malicious PDF — malware analysis report

Static analysis result for SHA-256 5302337fbe15a797…

MALICIOUS

PDF

94.8 KB Created: 2021-01-01 05:07:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 992cbb6d1120114e37e63d9cef77c37d SHA-1: dc44588e3b425f6f5f44919a359939328d6a0699 SHA-256: 5302337fbe15a797c354594830f645e6d5a68a46145f0d91d58a5329feb70998
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests an attempt to drive traffic to potentially harmful sites.

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
  • 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://gettraff.ru/strik?utm_term=ironmaster+dumbbells+120+for+sale In PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/jadurekofetuvedu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407562/normal_5fe84309b44c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411935/normal_5fcdc4773091d.pdfIn PDF document text
    • https://woliwaluv.weebly.com/uploads/1/3/4/6/134686062/42e7f3373a6eb2.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/99bf0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2b09da7-352e-48ab-9199-c60ec69b1c66/64943942094.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/88148679929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2131b123-5b14-4b46-9676-9013c3a2f458/43549439153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19178524-9284-4d50-a0e6-524930577fd5/87740441507.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/peptic_ulcer_drugs_classification.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/pdf_annotation_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26e18006-bdcd-422d-8d4c-4c159f7364d9/kazesikewofugezipijewep.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/ableton_live_9_crackeado_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232bbe9c-9fd6-49df-8def-11cc6670ed5d/buzokawen.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/gupirokedaxurexose.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_off000130da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130DA 5456 bytes
SHA-256: ae0712116a26e4dca302d9ebca9a016354e3a07b1d12cd52287e29d0256a686a
font_01_sfnt_off0001434a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1434A 12260 bytes
SHA-256: e3565158ed500727581c61298429ba9cdbbd0f82932e278f9579c935982d9c5d

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