Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddde2f82edf05c03…

MALICIOUS

PDF

76.6 KB Created: 2020-11-25 19:11:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0bc581176843bf325a78129239e20209 SHA-1: 193526c84b15c5b8026c10fbaffa8d707a23cbf0 SHA-256: ddde2f82edf05c031e0b70a9774c552a815261621e6f449563bf77d1ec6f7115
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://traffine.ru/aws?utm_term=street+fighting+2+mod+apk+revdl PDF link annotation
    • https://bamaxasujobuz.weebly.com/uploads/1/3/4/3/134315865/mufakakamolosep.pdfIn PDF document text
    • https://fodugivatixa.weebly.com/uploads/1/3/4/5/134501687/wakep.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/dc54f5e5-d1dd-404f-8c36-b9c779c5a7a8/periodic_table_and_periodic_law.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/137761ee-95bc-484a-88c7-30761c904576/tidewater_flying_club_website.pdfIn PDF document text
    • https://s3.amazonaws.com/giwurode/24039798289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2fa777-0bf5-4963-90c0-721a7c17c236/zuwugesaxenawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d123ac-8733-44e8-a4da-da61628db8b3/26170052143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe2cb53-6326-4220-868b-96f20fd6373f/89294364529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d106c71d-30b4-43e4-9c09-c5629ce0e5df/suzopalutugamavup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abc399b9-d907-4f3a-936a-b861a21a68a1/luella_high_school_demographics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/223c3e3b-251a-4567-9e33-063361e852f0/ditotedikeden.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2f1ae9-2128-48fe-a66c-baf3c433271f/meme_maker_font.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/jofusimekusesobomokut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d34c8c8-6002-4721-aa85-fb9e0602dbc0/83746845595.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC57 5636 bytes
SHA-256: 4fdf8dd0840721195768e8a5cf498ed907a366062d9b0034be6c3f7ba294f172
font_01_sfnt_off0000df57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF57 1936 bytes
SHA-256: 21a7146106e2ad29a4dcc6aa55cee169416400570e2b3d493b6d071cb256f2f3
font_02_sfnt_off0000e899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE899 11588 bytes
SHA-256: 5ac0d8f93c2f898d5f226fa01d42ad9efb7ba7f9c9ec29d89803b15eee114073
font_03_sfnt_off00010f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3C 16344 bytes
SHA-256: f3b95f1269985bafc3dfb9b5b35e76df8a4d57039a143c013aed99c7cf3a4a89

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