Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9595a3b2c4ab25…

MALICIOUS

PDF

84.7 KB Created: 2021-03-30 10:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 4fa7cb38c3ed6e5fec1b61bf97f46b73 SHA-1: 006fd0004df67b8af3ecb32bc2ea084ecb711096 SHA-256: 0f9595a3b2c4ab2559506ae73cb30ceea527d1c3c43d838bb4228a2abdceee6a
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely aiming to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/award?keyword=aneuploidia+definicion+pdf PDF link annotation
    • http://domsale.xyz/nigupugegituy5bgs.pdfIn PDF document text
    • https://madigapelodawip.weebly.com/uploads/1/3/4/8/134846312/914bbfa3c968.pdfIn PDF document text
    • http://0fruits.space/adobe_reader_crashing_mactamx9.pdfIn PDF document text
    • http://sikawejenidobux.iblogger.org/70969173516.pdfIn PDF document text
    • http://lovechat24.club/25066261663ncoel.pdfIn PDF document text
    • http://top-salez.site/blackpink_song_forever_young663wu.pdfIn PDF document text
    • https://zatemolepilud.weebly.com/uploads/1/3/6/0/136085897/5992217.pdfIn PDF document text
    • https://pajopujo.weebly.com/uploads/1/3/4/3/134305169/kuxijatidodimuselara.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dozore/6721499815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f84d29e9-f314-4896-8363-08c8f5cbfe0d/dell_optiplex_780_display_drivers_for_windows_7_64_bit.pdfIn PDF document text
    • http://wivegetozedogal.epizy.com/john_gardner_on_leadership_summary.pdfIn PDF document text
    • http://bixixus.epizy.com/nikixegixeta.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/ryobi_router_guide_bushing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff07639-ef98-44c3-a458-21ec23f22712/90836186858.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/what_sd_card_for_kindle_fire_7.pdfIn PDF document text
    • http://juzavogubi.rf.gd/rapezovejetimazosilupeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d08e014f-313e-4a2b-aab5-9e17cf090715/craftsman_gt3000_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a99cee0-87bb-4bd0-92e6-f6730f5fb26b/zig_ziglar_net_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5946f05c-9e16-4b44-8ddf-8081184a2f62/why_does_amazon_allow_fake_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51e846fe-3fae-4a68-a4da-61e5696435c8/1734-aent_series_c_aop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c490bd-9915-42da-81e3-c07cfc322405/25708483288.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_off0000fea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA2 4668 bytes
SHA-256: aafeaf1a406ae464a92d1687dad10a7cfaa76ed5c0b0a52490838323a2e28378
font_01_sfnt_off00010e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8B 12092 bytes
SHA-256: 6270cad5b565c7381465f88cf00e488fe7df4b06e0bdb0c978b507fc06f9fb15
font_02_sfnt_off00013605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13605 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f