Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf02b4a76dbf7a27…

MALICIOUS

PDF

66.5 KB Created: 2020-11-22 12:13:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0aa6d0284bb6dbfa2af069065bbc550b SHA-1: 09d64c402ba678b61ab7dd07eb221da6c9252b61 SHA-256: bf02b4a76dbf7a27271c2b041f35af8d7056af6685646df181d65ffdcdcf3636
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to 'trafffi.ru', suggests a link farm or phishing attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be designed to trick users into believing they need a password for an archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=ptd+2+hacked+working PDF link annotation
    • https://mirigemiw.weebly.com/uploads/1/3/4/7/134753474/vokonuzidonisuj_xorevobiwokij_sulovelifebajap_faponusesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421624/normal_5fa18ec34e462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_5fad56044214a.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/veraxawewib/high_school_biology_textbook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/10276423338.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/56056275775.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/12669868343.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/the_girl_who_could_fly_read_online.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/waloneredimirileriwoneli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21934438-1166-4a3f-bbd5-9abc46f4be30/tf2_spy_loadouts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f219a7a-99c3-4fae-ab34-262e508eaed9/nibagakigurakap.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/76529918315.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_off0000c7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CA 5280 bytes
SHA-256: 6cceb1716e230f411f0e64eae779f4f49fae971085a34ee9686eebd9d21a46a3
font_01_sfnt_off0000d9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CF 10540 bytes
SHA-256: be78b26da592d078dd1939c818ea7746ed99c9ab1431e27c61c372b1fc90d1c3

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