Malicious PDF — malware analysis report

Static analysis result for SHA-256 d026021c48afc787…

MALICIOUS

PDF

96.6 KB Created: 2020-12-08 11:21:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7b0b5ffec07685bc7a7adf3fcc1e5df1 SHA-1: aac7c718fb874deb8b8598e5a67f683f3ddce712 SHA-256: d026021c48afc787b65a9478678218e5df71c83a47c5856ee32e2d01d895679d
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying it as a PDF SEO link farm. A primary URL points to known malicious redirector infrastructure, suggesting an attempt to direct users to harmful content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=washington+river+maps+%2526+fishing+guide In PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/najebepo.pdfIn PDF document text
    • https://zigeginuserepu.weebly.com/uploads/1/3/4/0/134041232/fotegaze-wefapuvagos-nawenatefawuw.pdfIn PDF document text
    • https://robivitoj.weebly.com/uploads/1/3/4/3/134334713/basonu_ribonetul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lukepepe/55662493907.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1407d8787e879896e58f6/t/5fcefdad64290b1c3dccf95b/1607400878497/42204422110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a8bcb5-7520-4fdc-8148-ef483f47ed62/75135480229.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/molecular_biology_ncert.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/juvig.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2dcdd8ef7301f8b1d95ab/t/5fc690cfeaf37e3b6481b49b/1606848719903/82883053419.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/sugizesunovusofapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ea461e-786e-4c52-adac-a9402cc04d0c/46856611741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a29db658-b542-4761-a19c-9151ee246f84/kejipajuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91253b44-15cf-45c7-9362-d286a1dd6f13/23569450610.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/karenolosegaduzaje.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_off00013355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13355 5276 bytes
SHA-256: 9b73c9fd65b14e085fb363ac91d123c6c79c163cbb0f12574287558f270a8789
font_01_sfnt_off00014530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14530 13844 bytes
SHA-256: e1bb8da18002f8c80abf6310b7c2523412cf792883017d7766ca1be11bb34b5d

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