Malicious PDF — malware analysis report

Static analysis result for SHA-256 7233e4ced7966f15…

MALICIOUS

PDF

79.0 KB Created: 2021-03-18 06:57:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4452e39457632a1ca0bd1798c439bad2 SHA-1: d0c2984a18564eed20564b5e66a9d4a389e0bebc SHA-256: 7233e4ced7966f159a9d37049d3d683923e83e02a07615e1e649472f6b5aea25
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document was flagged by multiple heuristics and an ML classifier as malicious. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing operation. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a fake browser update or extension, a common tactic for credential theft or malware delivery. No scripts were extracted, but the presence of multiple malicious-looking URLs points to a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://pelibifir.ru/123?utm_term=aggiornamenti+app+android PDF link annotation
    • https://nagobajega.weebly.com/uploads/1/3/1/3/131380413/a6273b62.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/sakofox6enlc.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/orbit_irrigation_valve_solenoid.pdfIn PDF document text
    • https://cdn.sqhk.co/genopigup/ishin8m/bible_in_kannada.pdfIn PDF document text
    • http://ewop.space/aakasha_ganga_theerathinappuram_song_freey37lu.pdfIn PDF document text
    • http://wonnaturila.space/40026714806gg474.pdfIn PDF document text
    • http://jobware.pro/vajefigaxezovoduvosopez4d6b.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/99719730274.pdfIn PDF document text
    • http://zezasarasojid.mywebcommunity.org/zojirushi_commercial_water_boiler__warmer_169_oz_capacity.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/internal_audit_jobs_in_south_africa.pdfIn PDF document text
    • https://mupexopuwes.weebly.com/uploads/1/3/4/7/134722910/gasetusox.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/Ygcs0sL/racing_online_timer.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzojivemepe/gdclhfx/motitisukixerogoze.pdfIn PDF document text
    • https://dudixugodibemuf.weebly.com/uploads/1/3/1/4/131406925/8076170.pdfIn PDF document text
    • http://kalukawuwo.mygamesonline.org/37143032724.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/ribuwoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0f31a65-519e-42df-86ec-fa06690ea33e/can_i_update_tomtom_maps_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4aaa09-7b0a-414e-b491-c9ec918859a4/36753013227.pdfIn PDF document text
    • http://ruzakema.onlinewebshop.net/rich_text_document_to_docx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/177e1d62-83a7-427d-bd2b-47f40e15b524/dell_wd15_will_not_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/124da6a0-e166-43e8-9f05-4ec252b973b7/nikamakekixekirep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e866eb3-e319-42df-923b-43edf5ee96ea/corsair_k95_rgb_18_macro.pdfIn PDF document text
    • http://rewuwuja.onlinewebshop.net/zemetitulux.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_off0000f49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49A 5060 bytes
SHA-256: 7e253841590f1a415ab78854dfa00a319685a97b2df5f5069c18b999689dd860
font_01_sfnt_off000105ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BA 11996 bytes
SHA-256: 7b4ce524cda68df45f3b2c75b02b3dbae3a1a56dee5b6027451bf69350ca1a87