Malicious PDF — malware analysis report

Static analysis result for SHA-256 f012516a963f695f…

MALICIOUS

PDF

73.9 KB Created: 2021-02-17 16:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f547316d9517eee98ef3f0a20087fd13 SHA-1: 48725c5892adbada55ea11dfcf511461806cbe9b SHA-256: f012516a963f695f7b3c6d321f87d1fffadd44aa1917d9d4ea3c7315ebc67fa5
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=how%20to%20write%20composition%20about%20my%20favourite%20food In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402488/normal_5feaf68142b40.pdfIn PDF document text
    • https://cdn.sqhk.co/xusopusavo/qjhhghd/game_dev_tycoon_cheat_codes.pdfIn PDF document text
    • https://zixokamewi.weebly.com/uploads/1/3/4/3/134386319/7074991.pdfIn PDF document text
    • https://dojibabebane.weebly.com/uploads/1/3/2/6/132682208/nafijusoxuvitom_vikineleg_vobevevep_gamelerer.pdfIn PDF document text
    • https://guvoruba.weebly.com/uploads/1/3/4/7/134742814/toparelewifokate.pdfIn PDF document text
    • http://instapriz24.site/vetusuwepogog2qpo5.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzufoxo/gigghhF/sonic_the_hedgehog_classic_heroes_play_online.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/ygggiaY/bevaxivopivunebuto.pdfIn PDF document text
    • https://bipipabogudas.weebly.com/uploads/1/3/1/1/131164499/luxoj.pdfIn PDF document text
    • https://bivofeneduwid.weebly.com/uploads/1/3/1/1/131163561/kowibejivijezogitevo.pdfIn PDF document text
    • http://rastet-malysh.ru/sasimijederijolewufadenmnozz.pdfIn PDF document text
    • http://frukt.fun/ragenajefq8ffe.pdfIn PDF document text
    • http://autoport76.online/kissanime_sign_in42mt3.pdfIn PDF document text
    • https://xonaxogurevof.weebly.com/uploads/1/3/1/4/131453171/5210259.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/juliziwojatige/easy_worship_loops_free.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_off0000e48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48D 5624 bytes
SHA-256: f51df586574a05ebd27715a8bb3307c3a5b01e8c627c6ab5e2d1199c64dfa4b6
font_01_sfnt_off0000f7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AD 10320 bytes
SHA-256: 1a9f7c7fa4bcbe154f2013da239680c5a5410d3d9d3c8f5fecf4d7bbe82510bb