Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6f808a8cdbce79…

MALICIOUS

PDF

129.6 KB Created: 2021-03-30 01:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c373af161aedc8d67848449e72a9ca2a SHA-1: 9b2561958067bda01b434633e978b6383ba7e2b4 SHA-256: 0a6f808a8cdbce79051c23c362edfaa19033de97f38b53271dcfac355fe0a575
186 Risk Score

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 0.9587

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://vilenefex.ru/wix?keyword=hypodense+lesion+meaning+in+hindi PDF link annotation
    • https://rudadikisoma.weebly.com/uploads/1/3/1/6/131606677/bizumadovolixila.pdfIn PDF document text
    • https://mopopapepiror.weebly.com/uploads/1/3/2/7/132741339/5d05fca2b422d2.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/xjct0kE/6661868158.pdfIn PDF document text
    • https://porojole.weebly.com/uploads/1/3/4/4/134462866/gegejabuxi.pdfIn PDF document text
    • https://senugosuka.weebly.com/uploads/1/3/1/4/131454109/4684737.pdfIn PDF document text
    • https://cdn.sqhk.co/dimowitop/jgjhAie/xidaguxolutopijafepusu.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/dfQzQjh/xoranobo.pdfIn PDF document text
    • http://boxberry-24.cc/9221262625260qj7.pdfIn PDF document text
    • http://ideaita.fun/90689757162esiox.pdfIn PDF document text
    • https://cdn.sqhk.co/piredonina/1igjiaE/dj_mixer_player_pro_apk.pdfIn PDF document text
    • https://rabibenexu.weebly.com/uploads/1/3/5/3/135319922/zapixutanifewo.pdfIn PDF document text
    • https://pafegesufo.weebly.com/uploads/1/3/4/7/134719460/1562869.pdfIn PDF document text
    • https://sivikowililip.weebly.com/uploads/1/3/4/5/134599649/wijikeresusi-mofirokitadubez.pdfIn PDF document text
    • https://kekulepolunan.weebly.com/uploads/1/3/4/8/134889268/b9c9c1cc2449424.pdfIn PDF document text
    • http://trokot-new.online/92109222042zeed0.pdfIn PDF document text
    • https://cdn.sqhk.co/bogijifaviba/hXidjcH/best_flight_simulator_for_apple_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/zakolemafemo/a6Micgf/rts_3_program_danas_aladin.pdfIn PDF document text
    • https://cdn.sqhk.co/nelufebo/gcjeif5/tegareruli.pdfIn PDF document text
    • https://javetepamez.weebly.com/uploads/1/3/0/8/130814931/2865429.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/vjitWOD/pic_this_word_picture_search.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/rerinago/que_es_biopsicosocial.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/aleutian_islands_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/laguvezaxanewudedokope.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/a_levels_chemistry_tutor.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/xajoxoladitupikugosexafu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_011_off0001c132.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1C132 18176 bytes
SHA-256: 9a53eb0f5d899206140142024e1329928d04523b9b037af6ea44b3d64dff0b7c
font_00_sfnt_off00012de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE6 5684 bytes
SHA-256: d9df6945b54372b4ce1b038b385752c5e534dd56f39eb70cfae60a2504a527db
font_01_sfnt_off000141c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C2 5340 bytes
SHA-256: 36905e4a5f9bf67b9fe707401b1c333a2a6756b8fceb01e5ac18d134f92ef1ac
font_02_sfnt_off000153cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153CB 2656 bytes
SHA-256: dbaab8dcf32bfe64cb008f34eb54f5316f62236e8dffe3de49b44225404383a5
font_03_sfnt_off00015ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ECD 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_04_sfnt_off00016a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A2F 2328 bytes
SHA-256: 864cbe2c6973b44d2b71e19ffbffb2328dcb3759b07ceb43c11d5a372fc4956d
font_05_sfnt_off000174e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174E5 2108 bytes
SHA-256: d117309382da938f7dffedc42f90dd4217b4d540d75629b80669d975ecbc171e
font_06_sfnt_off00017eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EB0 6640 bytes
SHA-256: 538512be6c526ea957b587fa229624d829dca4873b622d187784a60d2c877fcd
font_07_sfnt_off0001904f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1904F 16196 bytes
SHA-256: 6b12da9a67d47daff436a2d1565717461e7c66b208442b6406599d955da9694b
font_09_sfnt_off0001de08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE08 5976 bytes
SHA-256: e63a80910e9cda34c546c384bcf884e4c41fb6edb36d494d0c5fb0601343bf27

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