Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f34d1004ebfcc6f…

MALICIOUS

PDF

80.6 KB Created: 2021-02-26 17:58:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a33f3ff7d4f04cf322e4a3279f41efc1 SHA-1: 482faf9d264e990b532bb9bf5b41ccbe257a6229 SHA-256: 3f34d1004ebfcc6fa3bd7bd67ac08487159e1c31aa5f0a76d4820568e56a84ed
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The primary URL, 'https://soxebez.ru/strik?utm_term=how+to+make+epson+printer+print+black+only+mac', is presented as a search result, likely a lure for phishing or malware. The ML classifier and ClamAV detection strongly indicate malicious intent, and the PDF structure with multiple external links aligns with techniques used to host and distribute malware or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=how+to+make+epson+printer+print+black+only+mac PDF link annotation
    • https://cdn.sqhk.co/xizemeginu/ghchbP0/neurotic_definition_english.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/berger_reloading_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/bemememu/iijgha6/3dlut_mobile_mod_apk.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/wenubufi_deliv_dusepi.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/walonanafatemuji.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/2djhrie/76742365830.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/La3gghi/recarga_nauta_wifi_en_cuba_fonoma.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/xapepetobivuwerazu.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/egf8rje/padop.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/flysky_nirvana_review.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/VRjbvgf/megan_boone_biography.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/power_cooker_xl_rice_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/7vjjhbu/9778486942.pdfIn PDF document text
    • https://lefitujeledezov.weebly.com/uploads/1/3/6/0/136028835/nukeke.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzojivemepe/Thfjijc/air_launch_meaning_in_tamil.pdfIn PDF document text
    • https://daxusumupazi.weebly.com/uploads/1/3/4/7/134702932/vukatisukikikar_newebos_dubafugus_napusipuponozo.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/kijelopazekune/87467280243.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/beddys_rv_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/gigavonefat.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/first_90_days_app.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/electrical_engineering_design_software_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/29831948840.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD79 5436 bytes
SHA-256: 0ff34003ab99878a444b46bf6c3138d5f24898ce3f7e88ff60b19bf2c40cc8bb
font_01_sfnt_off00010ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF1 10700 bytes
SHA-256: e81f9ef28784a46c8ad91255d2c63df0dd496ba256d371e6e902bb8ed1fb4c63