Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d611d618b8a595…

MALICIOUS

PDF

81.9 KB Created: 2021-03-16 05:08:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7abffaa0ea4f7f3eb181e0976982ec4e SHA-1: 7e469d22ec02dd08bf4fb31800d0f12196bf0a01 SHA-256: 09d611d618b8a5952402d74ac37c67c11c7436c75db81a1996d6204194acac28
156 Risk Score

Malware Insights

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

The PDF document is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier flagging it as a phishing trojan. It contains a link farm of 30 external PDF links, suggesting a SEO-based phishing or malware distribution scheme. The primary lure appears to be a "Valet remote start installation manual", which is likely a pretext to drive traffic to these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wix?keyword=valet+remote+start+installation+manual
    • https://kojepogezoxuta.weebly.com/uploads/1/3/4/4/134487575/5421747.pdf
    • https://cdn.sqhk.co/sidogorego/gdSehfr/bomber_friends_apk_mod_dinheiro_infinito_2019.pdf
    • https://tulixepatezapik.weebly.com/uploads/1/3/4/9/134902644/5987591.pdf
    • https://muvesajaduxu.weebly.com/uploads/1/3/4/0/134012660/pitajado.pdf
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/rajufe.pdf
    • https://felomavemupej.weebly.com/uploads/1/3/4/5/134583365/xomupewazaw-ramuno-lonat.pdf
    • https://cdn.sqhk.co/nojedajoze/8gjiel8/christmas_word_search_online_games_free.pdf
    • https://jetorijeroxu.weebly.com/uploads/1/3/4/6/134693882/6912624.pdf
    • https://cdn.sqhk.co/wifopuzuxiba/fwieDo3/97428315378.pdf
    • http://zenigegobub.iblogger.org/tagobawe.pdf
    • https://nupimixek.weebly.com/uploads/1/3/2/7/132712066/vegivokokif.pdf
    • https://cdn.sqhk.co/nujudemugipi/JQidyyD/angry_animals_jelly_shifting.pdf
    • http://vutisonoj.sportsontheweb.net/98206008853.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bosewavim.rf.gd/holmes_air_purifier_hap9415_manual.pdf
    • http://supuwevul.atwebpages.com/solikenegosit.pdf
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_dc7920f3b9b548e3ad5d6f296ffce580.pdf?index=true
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_1e7561925e8e48b781ef840a8609ef49.pdf?index=true
    • http://bapomel.epizy.com/kitchen_interior_design_website_templates.pdf
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_69d1a48c6f904f3bbc64169a7f5b1f71.pdf?index=true
    • http://logiweliziweje.onlinewebshop.net/accounting_for_inventory_management.pdf
    • http://lezemin.epizy.com/50303908984.pdf
    • http://refusunono.onlinewebshop.net/bobebatol.pdf
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_0ba8e4f8953243d3862b3c2c5640ead5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f530.bin
c3da6c03e80bb2be16646146116e6e31a2595d7a5dc2aa11a58d91b2cb82cd64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF530 4680 bytes
font_01_sfnt_off000104f2.bin
8c63163169405bf30a38b619789a594c5b6e76c023c5b54ab0ab3af006002adc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104F2 11536 bytes
font_02_sfnt_off00012bf6.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF6 4324 bytes

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