Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a1b55c4dfa6eb3…

MALICIOUS

PDF

66.9 KB Created: 2021-02-16 23:50:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6b16aaad6226b34a6683865212231909 SHA-1: 8f4b39d9779a3de31d86fd559f9f1a6b4e749aa3 SHA-256: 56a1b55c4dfa6eb3451e89366c8ed9d5109ba8c63b86ae0c0373feadb870b6eb
184 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector and part of a link farm on disposable hosting. The embedded URLs point to suspicious domains, suggesting the document's primary purpose is to lure users to malicious sites, likely for phishing or malware distribution. The presence of numerous links and the nature of the hosting infrastructure strongly indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=engraving+swiss+army+knife In PDF document text
    • http://daimontimur.org/lubipamaninazipis5dfs5.pdfIn PDF document text
    • http://floradoma.net/miami_airport_food_guidef3ini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375705/normal_5fe89a7609955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490272/normal_5fd60e8273b17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449411/normal_5fc97f0683e4f.pdfIn PDF document text
    • http://leree6.club/world_war_2_arena_crossword_cluetjy5v.pdfIn PDF document text
    • http://8gusevshop.space/siximubapeneviwozebubafucsjth.pdfIn PDF document text
    • http://dostafood.xyz/25566879171i8866.pdfIn PDF document text
    • http://kmplitka.shop/demivaziwofusipehtjs3.pdfIn PDF document text
    • http://academic-club.ru/libro_el_mundo_de_sofiaulfuh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369633/normal_60292fa582752.pdfIn PDF document text
    • http://hrushch.space/ejercicios_sistemas_de_ecuacionesu72dt.pdfIn PDF document text
    • http://uabiomanix.xyz/eclipse_java_free_for_windows_10arfc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408718/normal_5fe2a48c14f0f.pdfIn PDF document text
    • http://redit.fun/joystick_module_datasheetbdme6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485165/normal_5ff1ce4108064.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/povodijirig/indian_constitution_in_tamil_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/ct_min_ph.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/pewalafarixijunu.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/account_manager_apkpure.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_off0000c98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98A 5332 bytes
SHA-256: 03fdc59eedfb546e6348ba4c933bd6d57de3eecab4b4facbc7728ada6e02cb49
font_01_sfnt_off0000dbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBF 10172 bytes
SHA-256: c96cffacd693b590f5a7d6bd76a95f0b9ad4f1747ffb587e242593058e024f21

Open this report in the interactive analyzer, or submit your own file for analysis.