Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98ff00456581f5c…

MALICIOUS

PDF

67.2 KB Created: 2021-04-07 23:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4e34677c412aaaabba006655f5539e3c SHA-1: ba805471fd42ca5948e84bb3925c618a20877cf7 SHA-256: e98ff00456581f5c5d0c98bda902947ab73ce891141ecfb3f8714c0c783705c9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

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://jumiwimov.ru/wix?keyword=relic+purses+red PDF link annotation
    • https://cdn.sqhk.co/ralajelisoju/gjdXIER/28399645992.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/krups_beertender_kegs_brandsmvuit.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/bQxkbha/sugiverokomiw.pdfIn PDF document text
    • https://cdn.sqhk.co/redusebi/hibjujd/fox_racing_atv_goggles.pdfIn PDF document text
    • https://selokifasafu.weebly.com/uploads/1/3/4/3/134383977/1585439.pdfIn PDF document text
    • https://kamowosig.weebly.com/uploads/1/3/1/0/131069991/a619f07033.pdfIn PDF document text
    • http://ketousa.site/nifusomutbtft.pdfIn PDF document text
    • http://babixuxuw.22web.org/new_testament_reading_plan_120_days.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/42858777575.pdfIn PDF document text
    • https://wulelosen.weebly.com/uploads/1/3/5/9/135992808/voxikirudatubiv.pdfIn PDF document text
    • https://majijajivetik.weebly.com/uploads/1/3/4/2/134265766/vorowarij.pdfIn PDF document text
    • http://sidumila.iblogger.org/81656214467.pdfIn PDF document text
    • http://saleproducts.pro/24601975246n9u36.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tarexokugizizo.epizy.com/apsc_exam_preparation_books.pdfIn PDF document text
    • http://faduzidivatakid.epizy.com/91970387867.pdfIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/89959791513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ae2a24e-b977-4950-b346-8d6fa59b2fca/rigadamakufivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f0f6aec-c52f-4769-bded-1ebdab71e62e/how_long_to_cook_a_stuffed_turkey_in_an_oster_roaster_oven.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/les_types_d_alternance_codique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff20720a-9760-4608-a75f-d99dd5ec3528/71321552620.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/livros_brasileiros_para_jovens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f74f1a3-96f5-49f1-8238-e7adcb2e1402/nintendo_switch_error_code_2813_fix.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_off0000cbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB4 4864 bytes
SHA-256: 7efd7f6ad8d88cc05d2678800f592b2dcecd06de630dc8661c6500908b473b57
font_01_sfnt_off0000dc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC55 10188 bytes
SHA-256: 139a3a2f402ba0f61411d01472e114beb6c7212d850ff6cc15785c5c69d1aa42

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