Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4f0ac8d1ac1d35c…

MALICIOUS

PDF

97.1 KB Created: 2021-05-02 21:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 13895b303bc46c05e47fee99ee727e1b SHA-1: 2f2ebea27b4251a085c51a7b8f5bc8e5a680be5e SHA-256: f4f0ac8d1ac1d35cbb7c8491a5b8c37d0d175b291295533df77f6b08c92e65f6
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and a 'download button' heuristic further supports this, suggesting the document's purpose is to trick the user into navigating to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=never+fade+away+cyberpunk+bug+music PDF link annotation
    • http://submonster.xyz/weber_gas_grill_parts_amazonrwv0m.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/buKIPB6/promised_land_state_park_camping_prices.pdfIn PDF document text
    • http://revopuvazoxine.22web.org/cisco_ccna_book_download.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/oriflame_catalogue_download.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/witabuwi.pdfIn PDF document text
    • http://kulixebuvalafin.iblogger.org/slime_rancher_chicken_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/jjghij8/xelibevepuki.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/fIhiGKY/mivaxoxub.pdfIn PDF document text
    • http://cashthe.ru/90244583233fjynb.pdfIn PDF document text
    • http://hdvideo.design/21337959722itz9i.pdfIn PDF document text
    • http://jijibujubogogi.iblogger.org/zejafumixumedujawo.pdfIn PDF document text
    • http://dutusejutax.22web.org/xizufozefumabar.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
    • http://suvokejixu.epizy.com/l1_support_engineer_interview_questions_and_answers.pdfIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_0428087ae02e4e0b81e896e3c40cb820.pdf?index=trueIn PDF document text
    • http://zogosugo.onlinewebshop.net/duruziki.pdfIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_9c09c11b054d4b968ec217cbb52d5431.pdf?index=trueIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_1fd6a710becf4438a33680b3c70023eb.pdf?index=trueIn PDF document text
    • http://gajiwudozu.epizy.com/accenture_technology_vision_2018.pdfIn PDF document text
    • http://poferivinogaram.epizy.com/saturated_steam_table_si_units.pdfIn PDF document text
    • http://ralopokizuneza.rf.gd/43076772352.pdfIn PDF document text
    • http://degefoxovovi.epizy.com/fubupadodalokufejebemi.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
    • 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
    • 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDA 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off00010cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCE 5560 bytes
SHA-256: 2e729f372a907508b68fdf5525ca57372c589fd01277d4f466bc88f4620628a4
font_02_sfnt_off00011fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAE 1712 bytes
SHA-256: 3f0828ce8539d6704c3c5c487418eae6389b94b93c39031e834bee5c0f95218b
font_03_sfnt_off00012832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12832 11712 bytes
SHA-256: 2a904074aeca606b43033d4fdfa7e16fad51f5d3f9a7dd08a091b8c4dcab167a
font_04_sfnt_off00015089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15089 16188 bytes
SHA-256: 3835edc4e0c542677e632cac7c10c69e3bb009d48823b8b2d22bb30a5a413f4c
font_05_sfnt_off000165c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165C7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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