Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7de9060c1809834…

MALICIOUS

PDF

77.3 KB Created: 2021-03-24 02:49:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92277ca2cddd18e2751521b9219a62c7 SHA-1: 7a691ce28d35a1f81ed0e060f7a1263b937b60ac SHA-256: f7de9060c18098345896c055738c2a029bf1cad670000310cfa82cb629791834
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on directing the user to a link farm hosted on disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure the true malicious destination by using numerous distinct, low-reputation hosts. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution.

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
  • 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://soxebez.ru/strik?utm_term=what+does+the+color+black+represent+spiritually
    • http://remoliwagofaju.mywebcommunity.org/can_illegal_immigrants_get_drivers_license_in_new_york.pdf
    • http://dnepr24.info/spiderman_mask_template_freec4sum.pdf
    • https://fiwirilo.weebly.com/uploads/1/3/4/0/134096979/gujuwibavob_kazexupuzomigu.pdf
    • https://viforiler.weebly.com/uploads/1/3/0/8/130874197/sazexumip-bowogexa.pdf
    • http://worldthailand.fun/915785076vbmbb.pdf
    • http://legiontry.online/29830262127xxko9.pdf
    • http://tezibif.mygamesonline.org/53651487802.pdf
    • http://rigoditibalun.mywebcommunity.org/48747855185.pdf
    • http://tujubafi.getenjoyment.net/manual_de_materiales_compuestos.pdf
    • http://ruluzuzadol.mypressonline.com/8709890501.pdf
    • http://fexuvukenix.22web.org/kakimel.pdf
    • https://zoparidozuxeb.weebly.com/uploads/1/3/5/3/135390671/4078120.pdf
    • http://pro-komp-master.website/blue_jackets_tickets_for_osu_studentsgepdh.pdf
    • http://tersq.fun/68029403784lo6oq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nanugubodiw.epizy.com/can_you_annotates_in_evernote.pdf
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_e7f5a26d40274161ad93ce9bcd052392.pdf?index=true
    • http://taroveruwidiba.onlinewebshop.net/76312700050.pdf
    • https://da54c32a-99c7-4590-8520-800dd2d1cae3.filesusr.com/ugd/7973d2_d26e8ba6f2b44b3b8566ea15f56296e5.pdf?index=true
    • http://xepadofesopi.epizy.com/chapter_2_summary_of_the_watsons_go_to_birmingham-1963.pdf
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_dfc2693ddc724ebbaa7eaacc9078e4b4.pdf?index=true
    • http://lubozudaxik.epizy.com/76667070221.pdf
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_32e6a19a7931451a8962ddfe11519654.pdf?index=true
    • http://refofigeto.epizy.com/41641778483.pdf
    • http://sidepojedava.myartsonline.com/32275816153.pdf
    • https://c4647614-9ff8-4b00-b819-08dc938bd166.filesusr.com/ugd/5d3f24_a4dd569ef1b64f4f9f0aef7ba8fd7bd8.pdf?index=true
    • 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_off0000ef83.bin
b5f370b5e281f3706ab9b21c44a09b4ccee23d97c66696fe105e9482d37b8fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF83 5480 bytes
font_01_sfnt_off0001022d.bin
3211b81e71e56b811cc517c6ed0580ac8d9b0268be45729af57b8d0abcbb58b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1022D 10852 bytes

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