Malicious PDF — malware analysis report

Static analysis result for SHA-256 90511a9d861d4010…

MALICIOUS

PDF

73.9 KB Created: 2021-03-15 13:49:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 773a3cc108163a01341629edfb28e88d SHA-1: 2a9765270843ffbefeb89966c637cfd5318a9eef SHA-256: 90511a9d861d401040cb5c4b164b3e2fdbbbb7e4aa8fa64ceadfd7037ab7d5b8
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or scam attempt. It contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting an effort to obscure the true destination or spread malicious content. The document body, though heavily obfuscated, contains keywords related to making money, reinforcing the phishing lure.

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://leonvi.ru/strik?utm_term=how+to+make+money+trading+digital+currency PDF link annotation
    • http://drilltech.info/un_grito_desesperado_english_versionh86m9.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/how_to_deal_with_fear_anxiety.pdfIn PDF document text
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/kikutid_pobiku_rizibifobija.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/struts_hibernate_spring_tutorial.pdfIn PDF document text
    • http://sodaapp.pro/8951729589616ovl.pdfIn PDF document text
    • http://yoptan.space/82279061473wug2s.pdfIn PDF document text
    • http://digitalmicroteter.xyz/salalagerarazatoc2gia.pdfIn PDF document text
    • http://vseti.life/fezevilalebexawaxezurujorqv9qr.pdfIn PDF document text
    • http://merexazumebenag.medianewsonline.com/relaxing_piano_music.pdfIn PDF document text
    • http://skywonder.space/formato_de_avaluo_de_autos_usados8d7vk.pdfIn PDF document text
    • http://meetplafond.xyz/fepoxusakenugiferiguxakv7p0f.pdfIn PDF document text
    • http://vbruti.site/google_sheet_script_get_last_row2u6df.pdfIn PDF document text
    • https://rilawexiretik.weebly.com/uploads/1/3/4/2/134267086/tijovipasidab.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/wagner_915_power_steamer_instructions.pdfIn PDF document text
    • http://my-favshope.online/15325580285vhvbh.pdfIn PDF document text
    • https://nisaxiguxizi.weebly.com/uploads/1/3/5/3/135306566/7880063.pdfIn PDF document text
    • http://nibakelenixezas.getenjoyment.net/93308218209.pdfIn PDF document text
    • http://tozofuji.scienceontheweb.net/rig_veda_book_in_tamil.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/africa_river_map.pdfIn PDF document text
    • http://lifeeuro.info/pilizisiwuguruxn4pe7.pdfIn PDF document text
    • https://pukizorot.weebly.com/uploads/1/3/1/3/131384201/degoxajulu_xujuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tipokeviti.atwebpages.com/christ_apostolic_church_doctrine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e847b2f6-6b5c-421c-81da-3e32e5b24746/how_to_connect_soundpeats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73219240-4d6f-4f68-8545-d2a6ee6cf732/diono_radian_3rxt_rear_facing_limits.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_off0000e3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FF 5300 bytes
SHA-256: a998bc7d5d513c88306501392b43721eff11605ff75dc3e44909104e2154e182
font_01_sfnt_off0000f606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF606 10448 bytes
SHA-256: f68959847d5cc61fa3a24fa51951982c55287c8b2abc976a9b9bb23969cb17b8

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