Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa58c570e534404a…

MALICIOUS

PDF

85.4 KB Created: 2021-03-19 08:08:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: abf4f17675868c77f0b819355e550cfb SHA-1: c2e4fed0773785971590a363ab6a5879b9159d57 SHA-256: aa58c570e534404a72621eca7b270e7fa3c8bfd536b9397c1467272270845652
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to redirect users to other PDF documents. The primary lure appears to be an 'Arduino uno smd datasheet pdf' which redirects to a malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/strik?utm_term=arduino+uno+smd+datasheet+pdf PDF link annotation
    • https://minunelojob.weebly.com/uploads/1/3/1/4/131453060/1398699.pdfIn PDF document text
    • http://menbp.online/flight_simulator_2017_flywings_free_hack_apkq7azo.pdfIn PDF document text
    • http://jowivuv.22web.org/xbox_one_wireless_controller_power_cord.pdfIn PDF document text
    • http://kimisorunutom.medianewsonline.com/nixasowozozoviseragoxu.pdfIn PDF document text
    • https://ronifevux.weebly.com/uploads/1/3/4/7/134737402/potinojikux-nixopexalopu-pemafofavu.pdfIn PDF document text
    • http://adanakebap.org/966936962w7u4v.pdfIn PDF document text
    • https://takatika.weebly.com/uploads/1/3/4/6/134605824/pudelamuvoteb.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/d94c0d47.pdfIn PDF document text
    • http://osthondroz.com/skoda_yeti_automatic_or_manualiujy5.pdfIn PDF document text
    • https://deluwibenarut.weebly.com/uploads/1/3/1/3/131382693/3dcb96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kepagewav.atwebpages.com/diffusion_of_innovations_everett_m._rogers.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/vubul.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/top_free_open_source_project_management_tools.pdfIn PDF document text
    • http://furexuzajob.epizy.com/65930118459.pdfIn PDF document text
    • http://lopilizunutevo.rf.gd/what_rainforest_animals_eat_jaguars.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/68783718348.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/4537697048.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/94875206677.pdfIn PDF document text
    • http://lugenizuridaj.atwebpages.com/how_to_connect_atem_mini_to_atem_software_control.pdfIn PDF document text
    • http://gidetux.rf.gd/87219004528.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/58609699589.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 5120 bytes
SHA-256: 69f2efc8416e791a93e9dad591c5d7e6b777de3c14ae2d03d6bd9a8b32d92c58
font_01_sfnt_off000114fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FE 10448 bytes
SHA-256: a122c1a2a86c565343804dd41decfd8050def2d04e92dc3da4ac271f1d5add2f
font_02_sfnt_off000138c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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