Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5ff168442c3c65…

MALICIOUS

PDF

81.5 KB Created: 2021-02-16 12:30:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e4ee78aaeab00c1236edc54e88ae6fd6 SHA-1: 118aa7d24af98ff1e687245c34364357bd9666b8 SHA-256: 9d5ff168442c3c65eb82aa4b824fd1b31457e9f65c3553c66c8448bcf3b45ebf
226 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to contain keywords related to password hacking, reinforcing the lure. The presence of a password archive lure heuristic indicates a common technique to bypass gateway security by encrypting the actual malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://leonvi.ru/strik?utm_term=tp+link+wr841n+password+hack PDF link annotation
    • https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/4574404.pdfIn PDF document text
    • https://wokoxulepimam.weebly.com/uploads/1/3/1/4/131438011/velobiwepotufe-ropiguweju.pdfIn PDF document text
    • http://getsol.xyz/jolufasupusixan7q453.pdfIn PDF document text
    • https://joworuzofoluj.weebly.com/uploads/1/3/2/6/132683209/womidolevoniguk-zesexuvinefuw-napomabesepo-magamezikadi.pdfIn PDF document text
    • https://pinafizupefed.weebly.com/uploads/1/3/1/3/131380591/vojativu-dofesabe-viboxidagoxesow.pdfIn PDF document text
    • http://stnold.com/782277655997vegn.pdfIn PDF document text
    • https://vekoduxiboba.weebly.com/uploads/1/3/1/3/131398498/vojabuvelenup.pdfIn PDF document text
    • https://bitujidup.weebly.com/uploads/1/3/4/5/134598072/tivej.pdfIn PDF document text
    • http://dizaxabon.iblogger.org/94021280192.pdfIn PDF document text
    • https://mafatuxaxi.weebly.com/uploads/1/3/1/3/131384293/7eb28.pdfIn PDF document text
    • http://ultra0.space/duet_for_bear_and_dog_script54g8n.pdfIn PDF document text
    • http://bbflowers.net/72435246060qts09.pdfIn PDF document text
    • https://wabelurotetef.weebly.com/uploads/1/3/4/6/134693048/156305.pdfIn PDF document text
    • http://sawalaxal.66ghz.com/android_app_store_alternative.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://derekage.epizy.com/25582813070.pdfIn PDF document text
    • http://kijolitenelofon.epizy.com/bible_study_guide_for_all_ages_review.pdfIn PDF document text
    • http://wolekepivezune.rf.gd/bluetooth_software_for_acer_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/file_in_browser_typescript.pdfIn PDF document text
    • http://zekakodususebu.epizy.com/xinutepe.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/overtime_work_request_form.pdfIn PDF document text
    • http://pulawev.epizy.com/xulujovobuberabebe.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/crochet_beanie_size_guide.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DD 4120 bytes
SHA-256: 9c6e874003a374fe9f72069741578201d947ad506de17d7309b93e0f5c081efa
font_01_sfnt_off0000e66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66D 5600 bytes
SHA-256: 34a76ad1ea98091e4a79856a14999e4ee3fbf4ddb35980b5c692e61dbf95aff8
font_02_sfnt_off0000f988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF988 7444 bytes
SHA-256: ce75199cfedf7ea90379457721cc67656137a09da853d0c8eca2af777aadc73f
font_03_sfnt_off00011216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11216 10992 bytes
SHA-256: f7bfe8df8e349ec68c33d240864ee71170605128938e751d5b792767dc67dbca

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