Malicious PDF — malware analysis report

Static analysis result for SHA-256 42311fc2e1d93afc…

MALICIOUS

PDF

80.3 KB Created: 2021-03-15 00:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f066e71ebe224233dbc84753840a7a43 SHA-1: dbfca16da3256328e77c486e39819fc08177473b SHA-256: 42311fc2e1d93afc66e02dbe8687bb1cf472a001cc07f0bcd82a5e3b9782f9d7
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable hosting or unknown domains, suggests a phishing or link-farming scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically highlights the nature of these links, indicating a tactic to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://golowaki.ru/wix?keyword=even+odd+functions+worksheet+kuta
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/1075124f8f85b.pdf
    • https://kesozelakix.weebly.com/uploads/1/3/5/3/135300748/zubowabikoxirade.pdf
    • http://tipofeliluget.medianewsonline.com/10677187018.pdf
    • http://abwaab.su/el_caballo_de_troya_en_gratislgxqe.pdf
    • http://pubggaming.online/is_ashes_of_ariandel_worth_it21mv8.pdf
    • http://idealslim-ordina.site/70313118676fpny0.pdf
    • http://levelupguild.com/416233778841fu97.pdf
    • http://kzrovk.xyz/mugokerenadovetofaiimnq.pdf
    • https://tikiruwilowu.weebly.com/uploads/1/3/1/1/131163793/6579513.pdf
    • https://mufikufit.weebly.com/uploads/1/3/4/7/134766202/9668796.pdf
    • http://yoga-fitness.space/accounting_principles_11th_editionjj9ng.pdf
    • https://cdn.sqhk.co/vodadavubex/1githaC/sneaker_cell_phone_wallpaper_pinterest.pdf
    • https://cdn.sqhk.co/sisadenev/gjFific/mewodulidexazonimerakilux.pdf
    • http://larts.digital/crossing_over_occurs_in_which_phase_of_meiosis1gzt5.pdf
    • https://foxuginatumusex.weebly.com/uploads/1/3/0/7/130775376/5b1d3cb5bad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3cb17e18-a93f-4f93-ad50-f6d711688e61/raxipewufonuk.pdf
    • http://diwavubodinaroj.myartsonline.com/1984_wellcraft_owners_manual.pdf
    • http://sogoxutagejuno.atwebpages.com/71962830908.pdf
    • https://uploads.strikinglycdn.com/files/dc3f14f2-ae44-4514-a427-2c0d1b655ed4/roxidusetewab.pdf
    • https://uploads.strikinglycdn.com/files/bf8f7632-e4ab-4358-9b2a-f7df51aa1934/navy_leadership_training_continuum.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb6.bin
80665ee0de555e05b001e5e86be9dbdc8f9d956ac7448afa8003865e6e98f5fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECB6 6784 bytes
font_01_sfnt_off0000fdbe.bin
069da3a1dd4261e607dae91f4b922242da54bb4a637e0ce4346d3eff2f8cef8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 5252 bytes
font_02_sfnt_off00010fb8.bin
ff719410998887ef1dede8375b0601b3143a76fa61c7ea794f77fb020a2c2530		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB8 10448 bytes

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