Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04d717630f7aaed…

MALICIOUS

PDF

75.1 KB Created: 2021-04-05 18:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69792545d9ae419cdb6c032b2c7279c5 SHA-1: 51afbb21c10bdfb6d62d17796c3466111943560a SHA-256: f04d717630f7aaedd041b77c7cce7702f1b501045d8f2066828c7e452eacbdad
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links points to a domain associated with malicious activity. The ClamAV detection and ML classifier also indicate maliciousness, suggesting the document is designed to redirect users to potentially harmful content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=topsail+basketball+association+hampstead+nc
    • http://gebikomuxe.getenjoyment.net/69939593413.pdf
    • https://cdn-cms.f-static.net/uploads/4402481/normal_6020b31e0c079.pdf
    • https://cdn-cms.f-static.net/uploads/4417315/normal_6034de0fc2f03.pdf
    • https://static.s123-cdn-static.com/uploads/4375503/normal_6007a9a863ea1.pdf
    • https://cdn-cms.f-static.net/uploads/4500446/normal_60267f13225b5.pdf
    • https://cdn-cms.f-static.net/uploads/4421474/normal_602239b5a4a26.pdf
    • http://zezasarasojid.mywebcommunity.org/all_the_kings_horses_line_dance.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nabifovu/8202814559.pdf
    • http://pixafur.atwebpages.com/lenegoxagumo.pdf
    • https://s3.amazonaws.com/limepusotanal/6618248989.pdf
    • https://s3.amazonaws.com/gonima/ordinal_numbers_activity_sheet.pdf
    • https://s3.amazonaws.com/ruzaganog/wakiniwadutafofiratinas.pdf
    • https://s3.amazonaws.com/xisakazelelinim/indoor_cycling_app_for_android.pdf
    • https://uploads.strikinglycdn.com/files/ba4a8967-2be0-4b0c-8b98-62779406425b/lifuvowoposesiviperoruv.pdf
    • https://uploads.strikinglycdn.com/files/4f523958-6b6f-40ea-bd1a-2e8b22acadda/zirifaxiwoza.pdf
    • https://uploads.strikinglycdn.com/files/12d7ca77-4e0f-4c2f-8030-04dfbaf45004/canon_eos_rebel_t5_weight.pdf
    • https://s3.amazonaws.com/nasitevu/youre_the_parent_youre_in_charge_meme.pdf
    • https://s3.amazonaws.com/tafogusegabomu/77852908443.pdf
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_d809a1ff39434097a21abd8cfd179edb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/774c9872-1da3-4abf-8235-9c6eae0a8842/84458397095.pdf
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_217f1093c0fc4379af37a76bde5e3209.pdf?index=true
    • https://s3.amazonaws.com/gozifep/bendy_and_the_ink_machine_apk_pure.pdf
    • https://s3.amazonaws.com/makumapikeze/atonal_music_theory.pdf
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_1e961e80e49f4fb8bc57b3779232ec4b.pdf?index=true
    • https://s3.amazonaws.com/jobavo/bee_movie_app_latest_version.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbd4.bin
91dd91fb2a6a8676f0f57e08022be109a65e9986a0de090bb0cfe2cf7a64e462
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD4 5372 bytes
font_01_sfnt_off0000eddc.bin
0bffa03402480dacacf2561e0d274fe52505f17b15825b9619e184bb6a0f3cbf
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDC 2640 bytes
font_02_sfnt_off0000f96f.bin
2419e1a2a8335709dfd886f74f6b0009bf436860243b0cc8c6ae500ae363b32a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF96F 11104 bytes