Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b5f84a39e56b3e…

MALICIOUS

PDF

67.8 KB Created: 2021-02-14 11:08:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3801bb73fd885e5b61afe144fd568054 SHA-1: 19f0f2c20a8d5259ebff933b580092b7369fcc1f SHA-256: f3b5f84a39e56b3ef0ee587c83b44bd4956808fe1331585e5c4348d62140b225
186 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
  • 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://maypoin.ru/123?utm_term=strengthsfinder+2.0+pdf+free+download+tom+rath PDF link annotation
    • https://cdn.sqhk.co/metexemoraga/4lThci9/jupewejoxutage.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/gotomunamave.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/sU6BKge/45976600879.pdfIn PDF document text
    • https://tebugusenaj.weebly.com/uploads/1/3/4/8/134870623/4d5cd01a0986d4f.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/jQ3Fphi/96752677110.pdfIn PDF document text
    • https://desijikero.weebly.com/uploads/1/3/5/9/135964668/liliwe.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/iTHkghB/monster_hunter_clicker.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/gjfjjja/furniture_for_sale_by_owner_craigslist_dallas.pdfIn PDF document text
    • https://cdn.sqhk.co/lovojekaboxi/gjiheji/rozologuvuvuferemifiweki.pdfIn PDF document text
    • https://cdn.sqhk.co/fimirexuf/ggjggj0/73625143876.pdfIn PDF document text
    • https://giruwaferelesed.weebly.com/uploads/1/3/4/8/134850821/4670798.pdfIn PDF document text
    • https://fitarerak.weebly.com/uploads/1/3/5/3/135313257/piridetula.pdfIn PDF document text
    • https://juwaxevepatasi.weebly.com/uploads/1/3/0/8/130874094/c1c74c3f4297f3.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/CzXgeic/meme_sticker_pack_for_whatsapp_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/jdgjibt/68773214862.pdfIn PDF document text
    • https://cdn.sqhk.co/safubuguva/cihjcjg/amazon_alexa_show_8_best_buy.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/jixeremipet/schedule_b_2018_form_1040.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/14547240930.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_off0000bf74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF74 5956 bytes
SHA-256: 65726ce45d4d21fc0cbed0692e2d9618d8ffbed02a21c2cfd8932005264ec24d
font_01_sfnt_off0000d3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A9 13632 bytes
SHA-256: 15ef52ee5076a593bb1d98a2668a0b7fd795cd8c269f0e710aab137a3158e72a

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