Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d6eb37b83f9d7e5…

MALICIOUS

PDF

92.0 KB Created: 2021-03-05 06:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a89305c3c0036fd722d70f3acbd34efe SHA-1: 6552d0475ed971b1ed744a0136a326da34d3d5ec SHA-256: 1d6eb37b83f9d7e5a4667e3efb580159e6bc88e1da42d0e952d596d268c89a24
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malware distribution point. The ML classifier and ClamAV detection strongly indicate malicious intent. The document contains numerous external links, including one to 'baarspo.ru', suggesting it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=types+of+phrases+exercises+with+answers+for+class+7 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449615/normal_5ffb58687850f.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/fejeCgs/25460273064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455672/normal_6040d8035005a.pdfIn PDF document text
    • https://cdn.sqhk.co/forinabam/0hfHib4/wallpapers_hd_4k_backgrounds_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/hOaTBhQ/79275775405.pdfIn PDF document text
    • https://cdn.sqhk.co/belumozobu/hbkidgj/dasajedeladitonos.pdfIn PDF document text
    • https://fomememuvur.weebly.com/uploads/1/3/4/0/134000402/9b260284275ef.pdfIn PDF document text
    • https://cdn.sqhk.co/dilijenaka/EifKjfQ/64432387625.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/hFIgidP/judge_barbara_lagoa_2nd_amendment.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389616/normal_5fe37fcfd04c8.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/jbGhlRr/proxima_centauri_b_gravity_compared_to_earth.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468540/normal_5fd2c318aa479.pdfIn PDF document text
    • https://bunivuwavimi.weebly.com/uploads/1/3/4/7/134706582/vejewebujat-wowexoburi-lelemipuxir-tibasofakizet.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/iZwhije/gw2_super_adventure_box_world_2.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/df1bmas/summer_toe_nail_designs_blue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485153/normal_5fd67ef31ca50.pdfIn PDF document text
    • http://copyright-infringement.business/ping_pong_ball_pinball8ick6.pdfIn PDF document text
    • https://zaxezoxixuj.weebly.com/uploads/1/3/6/0/136097133/sewesosiwibumolofe.pdfIn PDF document text
    • https://wisadokuresagor.weebly.com/uploads/1/3/1/4/131436967/084f5a2a4abf339.pdfIn PDF document text
    • http://vitalia-transports.com/class_9_physics_chapter_1_ncert_exercise_solutionsk5x2p.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://s3.amazonaws.com/waxapoz/quant_finance_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/sosimaxolipugovevomesu.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/background_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/adobe_reader_free_offline_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/avast_free_for_windows_xp_sp3.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1E 5184 bytes
SHA-256: 213aed7afe828239827e6c9fd74fddffc2332c5870aa5845a0f38ec8500f24d7
font_01_sfnt_off00012dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDA 11128 bytes
SHA-256: 8fb2fb8cd0e34618a30e24e8e3d8bc5253cb53d016df633193686fc241bbf937
font_02_sfnt_off00015399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15399 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c