Malicious PDF — malware analysis report

Static analysis result for SHA-256 5338e993cca64b5b…

MALICIOUS

PDF

74.2 KB Created: 2021-03-09 15:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 42c0ba4862cd61b23d399759d27e1a60 SHA-1: 21018e0396843d38c77b90a3db3f07faf4601f20 SHA-256: 5338e993cca64b5bbd0d921bc56282529a4d647fa8945a5625ee72fb9cb547b1
186 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, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. The embedded URLs and the heuristic firings strongly suggest this document is part of a phishing or malware distribution campaign.

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
  • 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.
  • 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://baarspo.ru/strik?utm_term=how+to+draw+lifelike+portraits+from+photographs+by+lee+hammond+pdf PDF link annotation
    • https://viduxetejogat.weebly.com/uploads/1/3/4/6/134600114/tuteb_vudukuwitafemuf_domabubo.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/gomakutaxisi.pdfIn PDF document text
    • https://femobideja.weebly.com/uploads/1/3/4/7/134735935/c450328ce45.pdfIn PDF document text
    • https://sipovabamekejo.weebly.com/uploads/1/3/5/3/135391609/tajine.pdfIn PDF document text
    • http://gubuxuk.scienceontheweb.net/how_much_does_a_veterinary_assistant_make_uk.pdfIn PDF document text
    • https://lesamasipedu.weebly.com/uploads/1/3/0/7/130739144/gexofe.pdfIn PDF document text
    • https://bixoriwapavam.weebly.com/uploads/1/3/4/7/134731951/nigirup_vimesax_zuvodonilaf.pdfIn PDF document text
    • https://ribugasa.weebly.com/uploads/1/3/6/0/136053023/5925034.pdfIn PDF document text
    • https://piwusobalusuwav.weebly.com/uploads/1/3/2/3/132303181/88fc15572.pdfIn PDF document text
    • https://sidedelozamuk.weebly.com/uploads/1/3/1/4/131482822/d8e9f5b600ea8.pdfIn PDF document text
    • http://ligewazojo.iblogger.org/lawidiruruvomukobek.pdfIn PDF document text
    • https://jurazevogepepa.weebly.com/uploads/1/3/0/9/130969245/tonejada_businixedajub_kazinexososaki_jumuvodijo.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/37014517854.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae2d1aa-02b5-4607-9896-75f10f9b85af/how_do_i_reset_my_ihip_headphones.pdfIn PDF document text
    • http://zonurupadul.atwebpages.com/what_is_maritime_law_in_disc_golf.pdfIn PDF document text
    • http://devedejabamox.epizy.com/beluwugimadixawowubala.pdfIn PDF document text
    • http://xozodijavoxovun.epizy.com/assortment_planning_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50202682-ff9d-4583-af9a-e594a64ad49d/how_to_connect_plantronics_bluetooth_to_iphone_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c008b905-9c0d-4450-b46e-bc4ad197924d/11103268934.pdfIn PDF document text
    • http://mawokale.myartsonline.com/is_the_hp_stream_laptop_touch_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c9942a9-c513-4758-8348-7455d2b7c2db/81194112819.pdfIn PDF document text
    • http://dosunadis.epizy.com/30008211498.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/36980262200.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_off0000e404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE404 5816 bytes
SHA-256: 4bee835cee8ff78f816363e74f63b8251349b9117f99ce7cc783406bfaa488a0
font_01_sfnt_off0000f7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BA 10192 bytes
SHA-256: 5743b71231e219672851033d18b5a53e61fc3602201d3119940587ed4846e2e1