Malicious PDF — malware analysis report

Static analysis result for SHA-256 352b1e661aa4c2fc…

MALICIOUS

PDF

62.6 KB Created: 2020-11-25 12:17:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0c476a211432a25f323652fb15ac273a SHA-1: 7f8253aa19a76d84bba3d3aa09fecaff9e111930 SHA-256: 352b1e661aa4c2fc54827154c982e97ff0ffb086a13074b5ada5842c099dff1a
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with at least two identified as malicious or part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or redirecting to malware. The document body is heavily obfuscated and appears to be junk data, but the presence of the malicious links is the primary indicator of compromise.

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/123?utm_term=eastern+woodlands+beliefs In PDF document text
    • https://palujiro.weebly.com/uploads/1/3/4/4/134491920/3ab4011.pdfIn PDF document text
    • https://mibebedobosuv.weebly.com/uploads/1/3/4/3/134322580/1715297.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/1e5f44f77b.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/9d5643d1-883d-4430-9a40-9c1572e918a5/daboratajodukosisepefowi.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/53964004202.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/23966905995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21aabe21-4fd4-4566-92f1-8296ab5326b4/boot_washing_station.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/22163901150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/032a8e3d-8334-4ca0-b516-f0171caa9894/solucionario_de_mancil_1_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f34d04a-1deb-4dae-9a1b-33d6e241b679/70234940768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0513a3a3-1a06-4ccf-923c-8d8bb35d6d99/xasezo.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/gigonevetutotewubase.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_off0000bb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7B 5092 bytes
SHA-256: 670abd2c963bd4c5d3167bba7cde55bd11d4ce04d02ddee30ec9a3fdff86bf7c
font_01_sfnt_off0000cce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE8 9648 bytes
SHA-256: 8da784df692b9002c1581f23652aae7479ea9c3f3ed1d0e1ccd596a77d48daec

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