Malicious PDF — malware analysis report

Static analysis result for SHA-256 83abbb7ea921833f…

MALICIOUS

PDF

83.0 KB Created: 2021-04-05 06:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d9a0f14fb21d9d59e03de1564ba7a157 SHA-1: 50beb980c107fdeee15b617597c5f34be99554e2 SHA-256: 83abbb7ea921833f512bf5d19505324609530d44f59dd40e889281f75c8d70a6
66 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 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 0.9995

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://xajibur.ru/award?keyword=anti+radiation+missile+pdf PDF link annotation
    • http://alexandreablog.com/what_time_does_uk_stock_market_openuxrhc.pdfIn PDF document text
    • https://muxupodijem.weebly.com/uploads/1/3/4/8/134885552/33bd3.pdfIn PDF document text
    • http://xbet1.fun/gulavosabevin0qp.pdfIn PDF document text
    • https://fajorisovobune.weebly.com/uploads/1/3/4/7/134752278/6cde25f7a3.pdfIn PDF document text
    • https://xapebetilozeze.weebly.com/uploads/1/3/0/8/130873864/duvato.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://kasyanbeauty.com/42326404331bot2k.pdfIn PDF document text
    • https://wivopugigevu.weebly.com/uploads/1/3/4/5/134514529/pomowim_galigurizurawi_japivoniz.pdfIn PDF document text
    • http://vashastrahovka24.ru/28932248299prme9.pdfIn PDF document text
    • http://fbdirect.site/kugigajudowemuwo5twiw.pdfIn PDF document text
    • https://raxipova.weebly.com/uploads/1/3/4/2/134234678/7342178.pdfIn PDF document text
    • https://tejovobomogopiz.weebly.com/uploads/1/3/4/6/134626725/vabuluxek-barukudibelato.pdfIn PDF document text
    • http://familyit.info/junivisokameazm3m.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/db0e0e29-b490-4efe-aaa1-34be8564e84e/bexew.pdfIn PDF document text
    • http://nebosudigijo.rf.gd/40558946764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e75d227-8064-4574-b88d-b99b48ca12a9/digitech_vocalist_live_fx_bedienungsanleitung_deutsch.pdfIn PDF document text
    • http://nizamazibenu.rf.gd/espresso_english_3.pdfIn PDF document text
    • http://vigogogakuza.epizy.com/alexander_graham_bell_information_in_marathi_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b7bfdcc-4305-4574-a865-b5dea835d824/bitugadusamuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0703f71b-0b3a-461d-bd79-99a6e6e9a1d7/el_prncipe_maquiavelo_resumen_por_captulos.pdfIn PDF document text
    • http://delifas.epizy.com/xupetazuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42d930bc-4c05-4cda-8e63-0226e59678f0/damned_human_race_meaning_in_urdu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF708 3956 bytes
SHA-256: d545c6adce1d7e35396f5f226b6f3c4bed34d9173fd5c9d786889f922243f357
font_01_sfnt_off00010505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10505 5176 bytes
SHA-256: 40d3e2c9e20f3f5c03ed5206824d2df722d22dce44016c0cfd9cae2657ef24ce
font_02_sfnt_off00011687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11687 11308 bytes
SHA-256: d69e651c4dba7020be3726890167bb185382a8dd6778381f4eae4a62b0d8734b

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