Malicious PDF — malware analysis report

Static analysis result for SHA-256 276521380b801de3…

MALICIOUS

PDF

66.3 KB Created: 2020-11-18 17:58:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4588e83e620f1ee21494bd80f4bdea7c SHA-1: 83f06cd8d15f152f505cc8c77f4fec99f3ab96ed SHA-256: 276521380b801de39406b58678de64ea131b29f906c0b6bb7745b0a9639297b6
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'Nissan body repair manual'. The presence of a malicious redirector and a large number of external links indicates an attempt to direct users to potentially harmful content or phishing sites.

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://traffine.ru/123?utm_term=nissan+body+repair+manual In PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/sazusi-sanuwodu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_5fada5beecf6d.pdfIn PDF document text
    • https://jezitazosebizag.weebly.com/uploads/1/3/4/7/134700096/taxadifupesafutom.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/aa6bb843-fc2e-4d64-8409-8cdb2e3c73af/799388248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaddf211-e03b-4296-ad9f-991a63bf5885/dujabunekajutej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77678be7-9caf-445b-aaf5-35bcc77dd3a5/zesuxorodusupon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dd6a527-5263-40bd-95ff-3cf37fe58f27/chapter_14_study_guide_quizlet_us_history.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/autograph_full_movie_free_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/34760045923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ac5bd4-b471-4497-8827-0ce6d8facabe/sutatovijeg.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_off0000c86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86A 5316 bytes
SHA-256: b393768fc00a25d2b22df21ad696984c9e76539f79eb2dd24ec345b0bc68cdf2
font_01_sfnt_off0000da68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA68 10024 bytes
SHA-256: 1865e4a85ce11474ef18e6eb7e2afb66172c097172c049a4cc18f91cf326717e

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