Malicious PDF — malware analysis report

Static analysis result for SHA-256 927156ca9535f2b8…

MALICIOUS

PDF

91.4 KB Created: 2021-04-23 18:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c7e57eea9488c363f0bdb03882445655 SHA-1: 27dc8e5b240e68cfdebf9ad3112c60f830485a70 SHA-256: 927156ca9535f2b8c47761d8f7195b2c1b2dc28f5b9fee8d5cc711d6bb4055c4
156 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 heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely to manipulate search engine results or distribute further malware. The presence of embedded URLs further supports this, directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://jottigo.ru/strik?utm_term=roland+td+30kv PDF link annotation
    • https://cdn.sqhk.co/zumedizojas/vhijbih/sacred_grove_puzzle_hero_mode.pdfIn PDF document text
    • https://vedakevuvapi.weebly.com/uploads/1/3/4/0/134013486/roxisejudesutit_vunadojepij_pajag_kuposigi.pdfIn PDF document text
    • https://cdn.sqhk.co/tipusuzog/pzlgjhj/wufutebepokosededitogoti.pdfIn PDF document text
    • https://cdn.sqhk.co/visukodo/yVrjfjg/tezererarupad.pdfIn PDF document text
    • https://cdn.sqhk.co/puroneruk/hgitUli/gel_nails_done_near_me_cheap.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/p8iegjR/telemedicine_companies_hiring_nurse_practitioner.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/phbidYy/sandwich_spot_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/nitumatemi/dgjxJTz/viwuzezadesudono.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/dWszRie/86105891286.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/geicbCN/death_from_above_wow_short_story.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/BhOgekm/vuwufefed.pdfIn PDF document text
    • https://jutisopi.weebly.com/uploads/1/3/4/7/134775863/2957484.pdfIn PDF document text
    • https://cdn.sqhk.co/walekikem/hhG7jlk/download_the_sims_freeplay_mod_apk_max_level.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/5EUz0Ek/puzzle_emoji_300_pieces.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/eiihahd/background_video_recorder_app.pdfIn PDF document text
    • https://cdn.sqhk.co/dogilijesiwu/d0hiKjd/zombie_frontier_3_cheats_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/SGhgkbL/71858115386.pdfIn PDF document text
    • https://wobelafesuta.weebly.com/uploads/1/3/4/7/134767333/xokap-zevikipekonug-vitasugikudet.pdfIn PDF document text
    • https://kobalogowitat.weebly.com/uploads/1/3/0/7/130776452/1191751.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_d7882d2e9f7a41edb91fd0607b43874e.pdf?index=trueIn PDF document text
    • https://8a83ad47-1dc6-4e38-b726-138de0fe4a7e.filesusr.com/ugd/043c68_046f33c2a8ae4b23b7c5963e370720bf.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 4980 bytes
SHA-256: 77a24997a244bfe43ea8c0526374d84f4f2a164ccd7c11a7a275578229ddb800
font_01_sfnt_off00010597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10597 2496 bytes
SHA-256: 97d3954d2b15174dc44eec5dcc8675f3c6f03fa76d26c850c17f10a359fee1e3
font_02_sfnt_off0001102c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102C 25648 bytes
SHA-256: e83830b9230d44efe1f5946a92b4a94f496804e3bf86cf425a42cbd11ae5fa4f
font_03_sfnt_off000146a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A7 16876 bytes
SHA-256: 69cb347ec9cf8b230d14d772cffdf90406b941589bd873d85c76c66c47458d3f

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