Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a774c6cb8ef017b…

MALICIOUS

PDF

87.4 KB Created: 2021-05-27 20:36:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 2dced813be3e7f4a63b6d51e7d7c139a SHA-1: 5d410b914ce2ada2c8f1f10676d8bdba02d81867 SHA-256: 2a774c6cb8ef017bda349965bea31a60a6962b4d62de9efa0a864bb9fa7ee727
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links pointing to other PDFs hosted on disposable domains, suggesting a link farm for SEO manipulation or to distribute further malware. The embedded URL `https://botokaw.ru/strik?utm_term=when+will+sao+alicization+part+2+be+on+netflix` likely serves as an entry point or a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/strik?utm_term=when+will+sao+alicization+part+2+be+on+netflix PDF link annotation
    • https://xowozasa.weebly.com/uploads/1/3/3/9/133999953/7283310.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368949/normal_60015afc6223e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490116/normal_6026c2ad8c802.pdfIn PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/0c14ec04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_6021a8b427e63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416787/normal_60298abf7933a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_604e368310356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454811/normal_6060a9cb02a58.pdfIn PDF document text
    • https://duragafadave.weebly.com/uploads/1/3/1/4/131438389/sibirunokegoguti.pdfIn PDF document text
    • https://megafibi.weebly.com/uploads/1/3/4/3/134347288/bimekidoles.pdfIn PDF document text
    • https://felaxifuf.weebly.com/uploads/1/3/5/3/135320117/levopupoj_fidatijuxunise_juvewajadi.pdfIn PDF document text
    • https://fizetisiwukuz.weebly.com/uploads/1/3/4/3/134339589/powusisolaxan-wasufiloz-xewolufol.pdfIn PDF document text
    • https://dinidoleto.weebly.com/uploads/1/3/0/9/130969871/setixowuxewuvos.pdfIn PDF document text
    • https://guladusive.weebly.com/uploads/1/3/0/9/130969442/zogufedudi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416787/normal_5fe7a87617de6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_605b678a5e035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_6015ae284dd6b.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/f6c83c09-f275-4748-b33b-02b04735eaa0/47311502444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd3c75f-b823-4062-ba01-25f51657b208/how_to_use_beauty_by_earth_self_tanner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/675a29f4-a40a-4654-a112-2679bbc3c53c/ride-along_pack_package_usps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e66f7dc-a3ad-44b9-81d0-5b671262a7b2/where_is_the_filter_located_on_a_ge_dishwasher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec72d911-0068-41ef-9058-c036e6b44702/34092120762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff516c0d-10cc-44b1-9e58-f9692835020f/vugomixemujif.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_off00010372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10372 4992 bytes
SHA-256: 8d57bab0d84fe65b541e03ca9e58dcea27b1d4cc605c9ec9df0a915a6def56a2
font_01_sfnt_off000114c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C3 5596 bytes
SHA-256: 55c44f6856a9c2a95af9d8052e407371cb2548335a12b77bed74a03f6a0eb36a
font_02_sfnt_off000127f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F5 11680 bytes
SHA-256: 36be18ccf8c8918373d0b4e9d0a5050511442fa71f33a2aa93302c7939c0471c