Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e570a581571080…

MALICIOUS

PDF

72.8 KB Created: 2021-03-14 02:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 97c02b573121e4443d6d495950ab10d0 SHA-1: 8d45350e93ffdc5c032b491c7ee224a5d543f310 SHA-256: 45e570a581571080b6a2b65483592e2faced94aac23a574cb8f491ecb4cfc434
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or redirection scheme. The document body, though heavily obfuscated, contains metadata related to PDF creation, and the presence of numerous external URIs indicates an attempt to direct the user to external malicious content.

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://seumenha.ru/wix?keyword=nutrition+for+foodservice+and+culinary+professionals+pdf PDF link annotation
    • https://cdn.sqhk.co/rubogomuweme/tgcymgg/xufurexebotikipisazaxi.pdfIn PDF document text
    • http://potolkilife.ru/115706325792bbtg.pdfIn PDF document text
    • http://nakanilo.club/pokimagusuduxuvalunape3dgf3.pdfIn PDF document text
    • http://pc-remont.website/43612213630l4yx6.pdfIn PDF document text
    • http://firstflirts.site/638453421560j27j.pdfIn PDF document text
    • http://redita.fun/a_simple_favor_netflix_philippines73db8.pdfIn PDF document text
    • https://cdn.sqhk.co/nudadubuju/Dhcghib/89388802530.pdfIn PDF document text
    • http://dodajavux.scienceontheweb.net/forgotten_realms_campaign_guide_3.5.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/can_a_ninja_blender_be_used_as_a_food_processor.pdfIn PDF document text
    • http://poradoit2.site/best_camino_frances_guide_bookhwqg4.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/hjjjgg3/votibesox.pdfIn PDF document text
    • http://dreabling.online/64889575804xlkug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/zewoluzidewosowev.pdfIn PDF document text
    • http://zagopemolal.rf.gd/rearrange_pages_ipad.pdfIn PDF document text
    • http://jokosen.atwebpages.com/37056298583.pdfIn PDF document text
    • http://bitujavoza.epizy.com/92202408541.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/28545866025.pdfIn PDF document text
    • http://rosevasejila.myartsonline.com/chuunibyou_demo_koi_ga_shitai_characters.pdfIn PDF document text
    • http://nuxumejaxumem.epizy.com/nice_guidelines_clostridium_difficile_infection_treatment.pdfIn PDF document text
    • http://museduzapotu.epizy.com/kirasexudepexiza.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/77922450274.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAF 5280 bytes
SHA-256: 8a98f5687a1206c0f4209e521c6ec92c68b694e6e68f7e2c16a86d4420ccbd91
font_01_sfnt_off0000efd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD0 11184 bytes
SHA-256: 150057ad3561274995c4a659c6a19bf9b1ad4272739d6bc2a8aab02a5b2ce1a3

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