Malicious PDF — malware analysis report

Static analysis result for SHA-256 e046a57dafecffee…

MALICIOUS

PDF

68.0 KB Created: 2021-03-14 08:21:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b5329d4dfb18059bece65f6ccb5cb614 SHA-1: e8a464f1282ed6ba90bcf127eef18c93a36f9be7 SHA-256: e046a57dafecffee965a3306bf5c97c540a08d3b88c5b2ab4d21916c134ab67d
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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=finding+the+area+of+compound+shapes+ks2+powerpoint PDF link annotation
    • http://rasezatoxefu.mygamesonline.org/ge_317b6641p001_drip_pan.pdfIn PDF document text
    • http://wivevadevenumet.mywebcommunity.org/origami_modular_star_box_instructions.pdfIn PDF document text
    • http://xifutuvetowa.iblogger.org/pretty_little_liars_book_12_read_online.pdfIn PDF document text
    • http://wabowiwajej.iblogger.org/most_beautiful_dp.pdfIn PDF document text
    • http://ziwavabewite.66ghz.com/sikudasekizabeguvatak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://143c7e3e-1a56-4739-9c24-5aac26b0263b.filesusr.com/ugd/28d7c1_014e5945f4da4faa95d0bbb93285383a.pdf?index=trueIn PDF document text
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_d03c4073192e4d0dae675731781f96d2.pdf?index=trueIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_05b75bcbe6414d56b986c6035b996973.pdf?index=trueIn PDF document text
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_cc8b1c4c646b426da9fc7313485a8c73.pdf?index=trueIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_bf640cf655d14f0b858ff78b144aca27.pdf?index=trueIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_85460bd46ca14d5aa6843005ff40b298.pdf?index=trueIn PDF document text
    • http://fepebojinozid.epizy.com/mivoludeza.pdfIn PDF document text
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_2ea3756f7bab41939d85efb6d35c4afe.pdf?index=trueIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_91ccae7e5e044a968141f9fdc612ca02.pdf?index=trueIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_b86b4d9006be4f6d81a13f80eeb23062.pdf?index=trueIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_26d97333b5c44b24887ac7e321cc08d0.pdf?index=trueIn PDF document text
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_5a4994337ea145fbaf62c18892500d7e.pdf?index=trueIn PDF document text
    • http://dipagepe.atwebpages.com/naming_alkanes.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_18400ab1b3c64bc0bb74db6fbe0af9f6.pdf?index=trueIn PDF document text
    • https://6cabd977-7569-47b8-b834-fc65c40fd214.filesusr.com/ugd/84a5c6_db1eecb9aa1c48e8afc1f4d812c68f1f.pdf?index=trueIn 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_off0000cc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9E 5780 bytes
SHA-256: eacdd6e021d7bacc2f6d8d431a85cba2f9eb7cd0e2cecc20372f18ec4fa85724
font_01_sfnt_off0000e03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03D 9996 bytes
SHA-256: a6c6e4cbf24ce5f012984b282037aaf3e12b874e082f082c925d7d0d4717d66f