Malicious PDF — malware analysis report

Static analysis result for SHA-256 25419246bebc8e9a…

MALICIOUS

PDF

79.7 KB Created: 2021-03-23 09:06:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e5d95fcb4dcf24b68da5256fecbf9dcf SHA-1: b0b6cefb93949774643b48b58f678ea4930a5684 SHA-256: 25419246bebc8e9a5b110b5b70cc6c861864467861468f1dafebde70d0389cde
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 0.9993

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://jumiwimov.ru/wix?keyword=tribute+to+soldiers+in+hindi PDF link annotation
    • https://sugulidan.weebly.com/uploads/1/3/4/5/134508933/1021849.pdfIn PDF document text
    • https://miwijefovutifim.weebly.com/uploads/1/3/5/3/135316182/0b09868d.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/cirque_du_freak_full_movie_free.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/dugolet.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/sivunajv9cdd.pdfIn PDF document text
    • http://zebiripu.mygamesonline.org/42998758957.pdfIn PDF document text
    • http://veronaital.space/11739558992frwom.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/kofopedobawe.pdfIn PDF document text
    • http://idem-peshkom.ru/623101234545bjdd.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/dell_1320c_black_ink_cartridge.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/23605006545.pdfIn PDF document text
    • http://tamodemuror.getenjoyment.net/89319253202.pdfIn PDF document text
    • http://instapriz365.site/77819476561ivf22.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://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_3d94b6743ead4ad393e200aa1adec750.pdf?index=trueIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_4c7c264534104902b3a08bbdb3e1cfac.pdf?index=trueIn PDF document text
    • https://da4cb982-96ac-4827-b01c-1601b1c9977c.filesusr.com/ugd/b05c40_1cd1a9c1b6794d87a52198c4f326352e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f34184ae-d7d2-4144-9357-fa3cadab7fdf/xuxelixanomuvaweremir.pdfIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_c29a7b9d5a5f40fda6030ef6fb078f9b.pdf?index=trueIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_427aab5260634ed08950f0b68bcfc35a.pdf?index=trueIn PDF document text
    • http://miwewugewu.atwebpages.com/87149034085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/244d24b8-5c14-4cad-99d6-1d1214abae01/sebusewutosoxitesazafilaj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE125 4672 bytes
SHA-256: 667a7b023944e66a86107011a16a8204a5c57ea311dc3934be72a9aa937ebc02
font_01_sfnt_off0000f0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E0 2416 bytes
SHA-256: 0b476c7c4e8babb4e3571b28903ed2a180bb3d5e28a27c85e12d076587a28453
font_02_sfnt_off0000fbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC1 11456 bytes
SHA-256: eacd70ffbeeafb8a528ff84d99dfef5f940c3c6f584dd7cb37d8f770d969386d
font_03_sfnt_off000122a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c