Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f730980b547f6f6…

MALICIOUS

PDF

134.9 KB Created: 2021-06-08 23:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d9820ef6e4fa327cf98218c1b405a9ce SHA-1: 4752a6ed153d253ea35fa69457f158b0ba0af885 SHA-256: 0f730980b547f6f64d0990f7bb6d88870db40364989776404f999e6f398eb8e2
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URLs, with one prominent URL being https://kuzutuzo.ru/123?utm_term=battle+trip+episode+wanna+one. This suggests the document's primary purpose is to redirect users to potentially harmful websites, possibly for phishing or SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/123?utm_term=battle+trip+episode+wanna+one PDF link annotation
    • https://sulogaxelope.weebly.com/uploads/1/3/1/4/131438888/zamitemowi.pdfIn PDF document text
    • https://kiwudete.weebly.com/uploads/1/3/7/4/137499522/ledim_jubener_getuvizetinokin_dovus.pdfIn PDF document text
    • https://tabugutiku.weebly.com/uploads/1/3/2/6/132682541/wupuwefizavewujix.pdfIn PDF document text
    • https://sajawibur.weebly.com/uploads/1/3/4/6/134631073/64ad6f25.pdfIn PDF document text
    • https://luvupomadimudux.weebly.com/uploads/1/3/4/3/134350134/40e220f.pdfIn PDF document text
    • https://nagagixibedixu.weebly.com/uploads/1/3/1/6/131606435/4553046.pdfIn PDF document text
    • https://webebusili.weebly.com/uploads/1/3/0/9/130969565/5f7adc505dd.pdfIn PDF document text
    • https://losuwasujiro.weebly.com/uploads/1/3/1/6/131637226/8823153.pdfIn PDF document text
    • https://zewujinewototi.weebly.com/uploads/1/3/4/7/134749630/3132104.pdfIn PDF document text
    • https://kozizekovina.weebly.com/uploads/1/3/4/8/134891358/jefikegusapo-wimokal.pdfIn PDF document text
    • https://nogisapu.weebly.com/uploads/1/3/1/4/131453993/57e3f.pdfIn PDF document text
    • https://xiliperudal.weebly.com/uploads/1/3/3/9/133999468/bukowovumufikor.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/5365a16c-c0b4-4e44-85ea-d2ecd090b50f/65833110218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a5b701-c588-44be-98e0-98fc3a602388/wowak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7603c9-eaf7-4caa-b7b9-6b8055755c5a/fifty_shades_darker_short_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/751bfe81-1a92-413e-bc15-85a748a6033b/6822205085.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/w/file/fetch/144487842/sovinugisofibap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3b321a-74cd-42a0-ba35-0fc7b4c05aed/8421912209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c82ad654-0f68-4f69-ae07-42c25b6fba76/dogepimufobeniwipovuluviv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13583964-27ce-4068-8909-637f677bad52/clark_c500_forklift_water_pump.pdfIn PDF document text
    • http://beratirupo.pbworks.com/w/file/fetch/144510399/cs_lewis_and_tolkien_letters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dddd49b-d81e-467a-af11-0444b27ad373/how_to_edit_text_in_paint_youtube.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000172e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172E7 14444 bytes
SHA-256: d5039d1dcd5ac9e9608e446db070bb12d95cfb9799f3454e227db85d1af8d9a9
font_01_sfnt_off0001a00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A00C 5092 bytes
SHA-256: 112d1849ff2832d90954e2fad77445b88204e272446cea067bc433cfb48eac89
font_02_sfnt_off0001b171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B171 1952 bytes
SHA-256: 3f2ce2d979b81614d089de1b14f9f3dd670f7a5e49bbd6cf1a199f19e29dc309
font_03_sfnt_off0001bad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BAD8 14456 bytes
SHA-256: ad351763456dd54eb22e61e5fbacad7f6031dc959149e31ae02ecb1361f8b80a
font_04_sfnt_off0001e961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E961 19884 bytes
SHA-256: 72a8884e625942787fd64b9a6e8f982c20f75f936bf1d62435a3ca4181f0b0c9

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