Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c69401e5f92764b…

MALICIOUS

PDF

87.6 KB Created: 2021-03-21 10:56:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0342b22136db3730a0dea8c3f2dac656 SHA-1: 96fadda43603c4c0fd93b1e80b3771c1f74b2dc1 SHA-256: 1c69401e5f92764b42b3d014329cf4879e1235ab2f9e152babe1d917efab7b77
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/wix?keyword=olay+anti+aging+night+cream+side+effects
    • https://cdn.sqhk.co/kigaratak/JzhfM1T/space_commander_gameplay.pdf
    • https://cdn.sqhk.co/xonipavu/hbPjh3x/wesetegoxivoga.pdf
    • https://cdn.sqhk.co/mapexovebo/Yghwehj/45489577834.pdf
    • https://cdn.sqhk.co/kapapomabu/mFjidgf/agl_energy_share_price_graph.pdf
    • https://cdn.sqhk.co/ramidazumiko/iaUhiLh/jaburufagugeg.pdf
    • https://cdn.sqhk.co/viposaxa/hjGghhi/happy_friday_eve_fall_images.pdf
    • http://voseboler.iblogger.org/14738101938.pdf
    • https://cdn.sqhk.co/gubogezemazo/iighijd/dorotigawixeda.pdf
    • https://cdn.sqhk.co/lilanoto/jcw3jif/69249880193.pdf
    • https://cdn.sqhk.co/nemalerute/DTjhgge/60517663230.pdf
    • https://cdn.sqhk.co/letijefa/hPXgeTA/slice_of_life_manga_recommendations.pdf
    • http://xofinipi.iblogger.org/kjv_rainbow_study_bible_leather.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_b742ef33ea4f4876ace2dd5eb19b9425.pdf?index=true
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_47bf3f511d3d45db944fc9ea29b1a211.pdf?index=true
    • https://db38eef3-7d65-43a4-badd-ba39ed7d9417.filesusr.com/ugd/bd2483_11307ee9cb94445d823619d933a23cb6.pdf?index=true
    • http://nemagesuru.rf.gd/pl_sql_developer_for_mac_download.pdf
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_25f7b449acb348e7a01e2d173e3a86cb.pdf?index=true
    • http://lokokojorivumi.rf.gd/somewhere_beyond_the_sea_sheet_music.pdf
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_500aff9a61934f95a126e098ec38191c.pdf?index=true
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_67ae7315c05449789969562cab7f9205.pdf?index=true
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_938fc52e90e748d6ab438dd89f65483a.pdf?index=true
    • http://vekimawo.rf.gd/nephritis_lupus.pdf
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_4b11a0f52d994c0593cc3df3724f8ee1.pdf?index=true
    • https://1ba6f066-89d4-4445-b8a9-08a6de046ef2.filesusr.com/ugd/d40554_077cdb4191ec4247816be8fb0488f85c.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114e0.bin
16296208b73577742b5ed219cb65bd80df42c68ae4a0d9db6d35714aa62ab397		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114E0 5564 bytes
font_01_sfnt_off000127aa.bin
f4bf59b9087c4258c94ccc8880051a4470073f8bcb2d72e9fd6412166551da81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127AA 12500 bytes

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