Malicious PDF — malware analysis report

Static analysis result for SHA-256 6640fcb324efb046…

MALICIOUS

PDF

94.1 KB Created: 2021-04-14 15:32:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d29805232094742840d7214a9920df94 SHA-1: d2b2eb141345489e0487fa8231fe0ec91e2de533 SHA-256: 6640fcb324efb046dbe9791a37e915642fb34678d0e2fb338e8bb1942557d1b6
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, and contains numerous embedded links. Several of these links point to known malicious redirector infrastructure or are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains fragments suggesting a lure related to 'Link's awakening fishing glow'. No scripts were extracted, but the presence of malicious links is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dafemum.ru/strik?utm_term=link%2527s+awakening+fishing+glow In PDF document text
    • http://probmake12.xyz/how_to_live_alone_after_divorcegupkm.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/ed022ca5.pdfIn PDF document text
    • http://investmag.org/what_does_the_idiom_alpha_male_mean7jc3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496372/normal_6042ed6d6d654.pdfIn PDF document text
    • https://kadefevexenikoz.weebly.com/uploads/1/3/0/8/130813118/1540953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499299/normal_60684d8dd11bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461484/normal_5fecd4bba84b8.pdfIn PDF document text
    • http://seplafond.xyz/bibujuxujipfw9y7.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://xunopapazugatar.medianewsonline.com/1184424194.pdfIn PDF document text
    • http://kedepoba.sportsontheweb.net/alternative_investment_market.pdfIn PDF document text
    • http://ericksandoval.com/sibumivakalujekewofebd5qa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402501/normal_5fd254bc7c810.pdfIn PDF document text
    • http://menedowu.iblogger.org/pikiserabiroz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481408/normal_6010c75edfc08.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/juvuraguvutoxif/81069444361.pdfIn PDF document text
    • http://pusiruj.epizy.com/77013630282.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/fedebudumupunuvawij.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/44264504064.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/66789553462.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/tv_panasonic_modelo_tc_p42x3x_no_enciende.pdfIn PDF document text
    • http://subogerilazelo.atwebpages.com/gupipedi.pdfIn PDF document text
    • http://bototiluwoge.atwebpages.com/experience_certificate_sample.pdfIn PDF document text
    • http://tivapatovike.epizy.com/72250992623.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_off0001329a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1329A 5064 bytes
SHA-256: bdeb05640f6f692f145a7eb5875d5821940b4bc7e37004d18ad352d4c4cba65f
font_01_sfnt_off00014403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14403 10736 bytes
SHA-256: 9759eb1ccab8f04ab47b48d1c13d0c2cb3975b55c387d4ddfe74a7505cb8ec10