Malicious PDF — malware analysis report

Static analysis result for SHA-256 1362117ef6ead6ef…

MALICIOUS

PDF

78.6 KB Created: 2021-04-04 20:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5454b0ac011de9e7f733e9565a955f73 SHA-1: 97b4e27c46d082675080d2ecedcc0de65d7ae07a SHA-256: 1362117ef6ead6efb0cacd1af4eb5614b1e685c14094a9ea7dac16dda49a8286
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/strik?utm_term=is+dragon+sign+lucky+in+2020 PDF link annotation
    • https://noxajigaja.weebly.com/uploads/1/3/4/6/134698193/walanazugela.pdfIn PDF document text
    • https://furimubabo.weebly.com/uploads/1/3/1/8/131856330/duxevin-xaxem-silovajidoxak-kowiso.pdfIn PDF document text
    • http://vobalemujumojak.mywebcommunity.org/filirefafawoj.pdfIn PDF document text
    • https://vavirewafikeja.weebly.com/uploads/1/3/4/4/134402836/dubepimi.pdfIn PDF document text
    • http://wojurimaxab.mywebcommunity.org/21863727815.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/bopugu.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/dalarunafebifakomim.pdfIn PDF document text
    • https://datuzela.weebly.com/uploads/1/3/4/1/134109276/nefumedimuju.pdfIn PDF document text
    • https://cdn.sqhk.co/vorinugobol/ichjife/pozudun.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/25916078362.pdfIn PDF document text
    • http://tisejamebip.sportsontheweb.net/antidiabetic_drugs_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/siivaij/murderer_online_mod_apk_3._0._1.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/bexolamabad/longman_dictionary_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c123c3-e054-4bd7-90d8-1f2b8040a0a4/what_is_status_of_oxford_covid_vaccine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c30508-97da-4f83-a781-70162c26d413/are_dewalt_brushless_drills_any_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0cacda-d166-4832-a53e-deda710a7ac7/hp_pavilion_dv6-2130eg_technische_daten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e606a90-7134-4099-ba59-845d25f063f0/nukobamujasaxurifikoberur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c33aaf6-9366-4599-975e-3e9536ff5cc3/kiperujumukixelaluveluwu.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/zixirebida.pdfIn PDF document text
    • http://wujagenak.atwebpages.com/teduwojenofalixi.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_off0000f781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF781 5484 bytes
SHA-256: 08a05705147f79edf022a9f184cc98beb47156c266176cd68bd8fb8259093375
font_01_sfnt_off00010a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A42 10252 bytes
SHA-256: 75a13eec980e127746fc98209e62dffd0f7972c87fbd3f78d7f67ab1376e6572

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