Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f93aef797092f2…

MALICIOUS

PDF

148.4 KB Created: 2021-03-28 09:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 032d5e2ede8c09b80b1b71885a8dafd5 SHA-1: d23c157ce1d0a0ebe6e29a29bd2b15ee9cccf685 SHA-256: 29f93aef797092f25e4dae13865609e0b69c75db512150a0c9c118316ad8f3d8
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically pointing to a URL that appears to be a lure for 'ascii hex table pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. While no scripts were explicitly extracted, the presence of numerous links and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 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://golowaki.ru/award?keyword=ascii+hex+table+pdf PDF link annotation
    • https://lulujazopo.weebly.com/uploads/1/3/4/7/134769354/mimufirusemufa.pdfIn PDF document text
    • https://cdn.sqhk.co/rolekixawute/5hcXzif/ponet.pdfIn PDF document text
    • http://salonly.xyz/raruvekarovasovoj757z.pdfIn PDF document text
    • https://pelabomorifij.weebly.com/uploads/1/3/4/6/134628360/1975234.pdfIn PDF document text
    • http://mexicotop3.xyz/standard_of_excellence_book_2_percussion_freegih30.pdfIn PDF document text
    • http://natnat.fun/40111216728f70q1.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/tuxikijisinawebom.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/employment_news_weekly_knowledge_philic.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/ahjjajh/rusty_cage_christmas_knife_game_song_lyrics.pdfIn PDF document text
    • https://nidukonijeso.weebly.com/uploads/1/3/1/3/131381088/gojabesujuza.pdfIn PDF document text
    • https://zororoxuz.weebly.com/uploads/1/3/4/3/134309160/6047586.pdfIn PDF document text
    • http://resapus.scienceontheweb.net/59881584229.pdfIn PDF document text
    • http://shoop-ff.ru/parent_portal_ccsd_login6bt3d.pdfIn PDF document text
    • https://livugazenexaru.weebly.com/uploads/1/3/1/6/131607095/3bdaa2fdd244.pdfIn PDF document text
    • http://kvrovk.xyz/yds_publishing_impact_grade_12_answeh8u1i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_95a1a20f871d40f497b4db8b28248530.pdf?index=trueIn PDF document text
    • https://0ed30ddb-3df1-4505-9e4e-3e87fc6d20ea.filesusr.com/ugd/f043c1_9b03c13d0b504b5a809ba826210fffaa.pdf?index=trueIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_9f2497d7e9714622b799cba453f2a9fc.pdf?index=trueIn PDF document text
    • https://53002a68-e35f-4167-ac88-1ab9777d7e72.filesusr.com/ugd/f5bc2a_76bbcc2aedcb42509be54390d48d015e.pdf?index=trueIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_9ab12e1131a340c083d53e06794e08e4.pdf?index=trueIn PDF document text
    • http://relivoziz.atwebpages.com/86015012469.pdfIn PDF document text
    • https://07a970a6-a864-461d-ba0c-8deda34efc75.filesusr.com/ugd/b56c0d_9391a96eada8401dba855e90d5993398.pdf?index=trueIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_3b5073217e4a4f8b88f3e25dff7334f7.pdf?index=trueIn PDF document text
    • http://lojubefogugiku.onlinewebshop.net/mofogulerajajumiretuvixag.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bf67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF67 4916 bytes
SHA-256: 6d212a6c0031073376afea5cb358e6e17ca0c39051d1a5d539b94a036e11d0f4
font_01_sfnt_off0001d026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D026 15972 bytes
SHA-256: 2b97ba4c06bd8039ac5c96bff00e5add8b2bbb72f3c3cb8f2d48db80b251d24a
font_02_sfnt_off0002036a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2036A 16200 bytes
SHA-256: dd8a01d90701d8c526b8b1392db5416ae5d05341aab0cdd5840b3a76f460e31d
font_03_sfnt_off000218a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x218A6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
font_04_sfnt_off00022669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22669 13500 bytes
SHA-256: 510355346430ee388cc9456cbc8daa03e1972a4662ea49a0ad5c13c14a537ac6

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