Malicious PDF — malware analysis report

Static analysis result for SHA-256 030797575d2d3a84…

MALICIOUS

PDF

72.7 KB Created: 2021-03-01 14:25:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31a794a5722288bd9e21c64a9eefa898 SHA-1: ea5f5b7d46fa7f279348218f5fff30d98047d6e7 SHA-256: 030797575d2d3a845141a64e2a5c952942175ce722762555a04248ad9fb74bd8
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a spearphishing attachment.

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://jumiwimov.ru/strik?utm_term=arduino+vs+raspberry+pi+zero+w
    • http://beviluxenumiliv.mywebcommunity.org/61059561230.pdf
    • http://dixunawizodel.iblogger.org/australian_drinking_water_guidelines_2017.pdf
    • http://patajafurep.mywebcommunity.org/what_does_garmin_lmt_d_mean.pdf
    • http://gerawat.22web.org/13295186543.pdf
    • http://blubadgehelp.net/guidecraft_dress_upq5a1h.pdf
    • http://sevowina.medianewsonline.com/how_to_clean_small_keurig_coffee_maker.pdf
    • https://cdn.sqhk.co/nijedesakuj/WjjSha0/risiriwow.pdf
    • https://cdn.sqhk.co/nimuxugemu/Qjiigbm/tiktok_disney_dog_filter_icon.pdf
    • http://xafesuvorolivig.scienceontheweb.net/rca_universal_remote_codes_surround_sound.pdf
    • http://mixutadumekaje.mypressonline.com/how_to_setup_craftsman_assurelink.pdf
    • http://vadosixajobirug.mygamesonline.org/dark_souls_3_wiki_deutsch.pdf
    • http://neojust.ru/2011_rav4_features5pt9p.pdf
    • http://storedubai.shop/crossroads_inn_campaign_guideuuov8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wuwovedivaz.rf.gd/dr_martens_size_guide_shoes.pdf
    • http://nozuwodapa.epizy.com/lokugilefilul.pdf
    • http://vilepobafomunow.atwebpages.com/is_breville_air_fryer_good.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddb2.bin
da4b203f2c138b1cd6ec291602cf6f64944a08f2a88dcbec4dd796e692fbe5e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB2 5356 bytes
font_01_sfnt_off0000f010.bin
5428d28c907aaa0f7c1ea12160216c055daef5ddcbad63af371a384b7fd8aee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF010 11104 bytes

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