Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3aae2dbd0626fc0…

MALICIOUS

PDF

77.2 KB Created: 2021-03-21 21:36:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bfec246462d62b75ff5dc36f6d80876a SHA-1: d10d8ad882251363dbf99670fb8a93d1532f91d4 SHA-256: c3aae2dbd0626fc0a5a4793d1fbb5b3fd6dc8080f0924adce23e5a744c178e5c
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and exhibiting characteristics of a link farm, suggesting a phishing or redirection attempt. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jottigo.ru/123?utm_term=north+carolina+revolutionary+war+uniforms PDF link annotation
    • http://tafuvomilo.22web.org/absolute_advantage_theory.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/fopezujixot.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/kosuvanizuvatox-vapejunizawo-zudosizun.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/star_wars_lego_character_encyclopedia_book1m85t.pdfIn PDF document text
    • https://dawudetunik.weebly.com/uploads/1/3/5/9/135972975/tutasewetew-wuwuxabalekos-jonimaje-surefuxe.pdfIn PDF document text
    • http://fexuvukenix.22web.org/newspaper_bill_format_in_excel.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/drastic_ds_emulator_apk_download_iosz8k2f.pdfIn PDF document text
    • http://naxenavuk.22web.org/keurig_k525c_plus_manual.pdfIn PDF document text
    • http://fullstacket.online/drug_lord_2_game_iphonewgpt8.pdfIn PDF document text
    • http://bumalutaf.iblogger.org/parosupidowalawexaxapali.pdfIn PDF document text
    • https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/nikotofe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xafexepov.epizy.com/71425928463.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/the_hollow_men.pdfIn PDF document text
    • http://darewuxopasog.rf.gd/jiwekozokazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7575b31b-e25c-48af-a78f-a327b728c69c/kodak_easyshare_dx6490_usb_cable.pdfIn PDF document text
    • http://nanixigawosupiz.epizy.com/nubakoxig.pdfIn PDF document text
    • http://zululofigitesep.epizy.com/22888820111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbbd6c66-5957-4ef9-9bd8-a64996762bd8/japiledufuwokudajovakuw.pdfIn PDF document text
    • http://padusij.onlinewebshop.net/65718946187.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_off0000efbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBE 5344 bytes
SHA-256: 7e23ab741745cb19dd53d542d3a2d73f9950a1a98e343c8f44e7c4dadbe218ad
font_01_sfnt_off000101e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E2 11084 bytes
SHA-256: 3e12851168ba17dab490368a6868843568d44860455afc18482e234454c338fe

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