Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ae00ff3a6aa0ca…

MALICIOUS

PDF

87.1 KB Created: 2021-03-22 01:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7e08dbaf0b4bcae41c5a5c24c7a9a129 SHA-1: 9ff61829ab336dadba4cec32a0edc11bf5ad52be SHA-256: 82ae00ff3a6aa0ca7c460e870112b23c4bab5b7486ab6ea3a2a32b8d09cde222
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate it uses a link farm on disposable hosting and attempts to lure the user into executing commands by copying content to the clipboard. This suggests the document is designed to exploit the user into running malicious code, likely to download and execute a second-stage payload.

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://nipisod.ru/strik?utm_term=how+do+i+enable+the+command+key+on+a+mac PDF link annotation
    • http://xojuxelase.medianewsonline.com/why_does_my_kitchen_faucet_leak_at_the_base.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/where_would_you_go_bernadette_cast.pdfIn PDF document text
    • http://zomosidotewe.sportsontheweb.net/pardoner_s_tale_summary.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/baby_bjorn_carrier_instructions_front_facing.pdfIn PDF document text
    • http://jojazinex.mygamesonline.org/66015075726.pdfIn PDF document text
    • http://russianpatentexpert.com/how_to_tie_a_mens_bow_tieuz70y.pdfIn PDF document text
    • http://discount50it.pro/872751671122nkig.pdfIn PDF document text
    • https://bojuwakuxejekur.weebly.com/uploads/1/3/5/3/135347713/puguvalugajiza.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/bajrang_dal_song_2017_audiomxqvx.pdfIn PDF document text
    • http://magnitoli-2ekran.site/how_to_pair_blue_parrot_450_headsetdci8x.pdfIn PDF document text
    • https://zevigutuxokalu.weebly.com/uploads/1/3/4/7/134769804/felizujazojonopik.pdfIn PDF document text
    • https://dubobovutorikug.weebly.com/uploads/1/3/5/3/135332124/sanukenusutuxaxu.pdfIn PDF document text
    • http://javefuxola.getenjoyment.net/45314648052.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/asp.net_mvc_dropdownlistfor_selected_value_not_working.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/d-link_dir-890l_ac3200_router.pdfIn PDF document text
    • http://baxewape.myartsonline.com/cephalgia_kronik.pdfIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_cb42fd939cc14f4fb7296667515196f9.pdf?index=trueIn PDF document text
    • http://sidepojedava.myartsonline.com/illinois_safe_haven_law_age_limit.pdfIn PDF document text
    • https://3f054cde-0430-4828-89d0-5f77035cf230.filesusr.com/ugd/d93890_a3044a5a20994d30a70ac71078ae3672.pdf?index=trueIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_69293e4f950b4838bf27c4469de0162a.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_ef7052a74156445c823ac0dafcbcf5bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lewuli/2003_ford_focus_se_zetec_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/acknowledgement_form_template_california.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/lasko_t48314_performance_48-in._tower_fan_with_remote_control_t48311.pdfIn PDF document text
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_b588d192326f4aa993523514d0e163f4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10084 5264 bytes
SHA-256: 6526bb0a2e83b9f089ecd9fc35308ef6408232649520feb65b792a1d2f33e84f
font_01_sfnt_off0001125a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125A 11008 bytes
SHA-256: b9da2638330d5bc7ca9b0117375c81ced0ac101db457ff757bb0e26772b90577
font_02_sfnt_off0001382a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1382A 16576 bytes
SHA-256: dc9d1b5614deb521f95fe182bce0aeb533a5f9c235b002075c25c4adfbf0dc5b