Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d653bbb67dbeee…

MALICIOUS

PDF

89.5 KB Created: 2021-03-19 04:06:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8c397977d7e5d109f3f8d9bdbf96457e SHA-1: d6879c9de02022d889f9f7cc7ebdb0ee294a194d SHA-256: e3d653bbb67dbeee249b69a60f25cbbf5dea1605ddff6923c5ff5f5d91cb43e7
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=how+to+make+a+mob+farm+in+minecraft+1.16.2 PDF link annotation
    • http://ponemofetu.scienceontheweb.net/21596593275.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465270/normal_603473eb19ef4.pdfIn PDF document text
    • http://xanusojuruxu.sportsontheweb.net/makalah_akuntansi_pemerintah_daerah.pdfIn PDF document text
    • http://fokefetebebinin.66ghz.com/rivadetak.pdfIn PDF document text
    • https://cdn.sqhk.co/difotolu/K5hh0Eg/kikulul.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/Q9iirns/vezazevaforotol.pdfIn PDF document text
    • https://vetitigozep.weebly.com/uploads/1/3/1/4/131437709/nopur-luguvegidufapa-mufojikup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457876/normal_605186d9c1301.pdfIn PDF document text
    • http://kuwelalo.22web.org/how_much_does_a_pharmacy_technician_at_walgreens_make.pdfIn PDF document text
    • https://losaburi.weebly.com/uploads/1/3/5/3/135322327/nenulibojiw-xixuretezad-sidugi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392661/normal_5fe52f6c7bda6.pdfIn PDF document text
    • https://cdn.sqhk.co/zigotimuti/Pjb24id/gta_5_luxor_deluxe_how_to_drink_champagne.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470839/normal_5fff56df0c1ba.pdfIn PDF document text
    • https://cdn.sqhk.co/miweguzeg/iicKHje/80s_music_hits_classic_rock.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454182/normal_6018a4613889a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeborawaleko.atwebpages.com/65350816353.pdfIn PDF document text
    • http://bivadalov.epizy.com/canada_immunization_guide_hep_b.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52174392-6e91-4f28-bc7e-215274b4f6c9/allen_bradley_powerflex_700_manual_series_b.pdfIn PDF document text
    • http://nunemasagabegu.rf.gd/42491212330.pdfIn PDF document text
    • http://kazaxese.epizy.com/website_er_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64929303-7ac0-4179-8bbe-28e386694e25/d-link_dns-321_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b052190d-4da6-479f-9713-988b5e33931e/how_long_does_a_maytag_bravos_washer_last.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_off0001204c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204C 5444 bytes
SHA-256: 294e81e9646d1b488cd0a2647f6cd61969ef9a9bcae0374203ffb18885ff5ef2
font_01_sfnt_off000132dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132DC 10976 bytes
SHA-256: c45459560a940830c1ee512ad35e5969de0d039c1a003188a4b81e9c07514802

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