Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f8baf8fd292a89…

MALICIOUS

PDF

77.5 KB Created: 2021-02-20 07:39:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 47e636ccfda40639e79847fb9d732a3d SHA-1: 68417388e81939614a626257c300d899516e592f SHA-256: d5f8baf8fd292a89b293f7e21d8fec134f3328e72d0c9003edf4d9026904871e
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs pointing to disposable hosting and link farms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to its creation, and the presence of embedded URLs confirms the malicious intent to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://bologen.ru/wix?keyword=mendel+punnett+square+worksheet PDF link annotation
    • https://cdn.sqhk.co/nivurerazusa/fxqjaCY/story_of_a_gladiator_switch.pdfIn PDF document text
    • http://sefesipodaj.22web.org/chocolate_girl_song_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458412/normal_601dfbae6ba5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454995/normal_5ffa859cd970f.pdfIn PDF document text
    • http://dikiwezuvejeve.iblogger.org/host_family_applicant_listening_answer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383805/normal_5fdd6131c3c05.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/frQiiid/37291802605.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/7jfHghh/86930748434.pdfIn PDF document text
    • http://topitoxituzoju.iblogger.org/videohive_glitch_logo_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466376/normal_602a6e699cc8f.pdfIn PDF document text
    • http://zupebupinumupo.iblogger.org/92467149754.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/kbjgbhe/wegajigawowitaruram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_6012d6f00fd7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_5ffaa1671e4d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465704/normal_601b1f1c7c75f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368503/normal_5fcf21873d1f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_602b58b17cf92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461761/normal_5fe607caed1c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_600b16f9041dc.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
    • http://mesesoriran.epizy.com/jowovapamir.pdfIn PDF document text
    • http://memaded.epizy.com/zevejuwazibutozanike.pdfIn PDF document text
    • http://gogewarixisude.epizy.com/xonegapesafoxasabomope.pdfIn PDF document text
    • http://loluxemo.epizy.com/avery_templates_8160_excel.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_off0000e5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C9 5168 bytes
SHA-256: 8899017a8484b714b1832ae5e8f8f03c32385ffac578e14a5192cbb9bb2dcdf6
font_01_sfnt_off0000f763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF763 10248 bytes
SHA-256: 45625050308326a0165540a3ba1e12d7593e5ec636f0f759a75d59806f95bbf7
font_02_sfnt_off00011a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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