Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea472bee8757bbc…

MALICIOUS

PDF

117.7 KB Created: 2021-03-14 20:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 476d6fbdc4b3b1176af4caaf41a7e21e SHA-1: 2801ca1000467392303fd901e472e9dc56496d8a SHA-256: aea472bee8757bbc7a8cf6584a09278eb9b19ee8a1e103ee567de550ed3c1441
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://leonvi.ru/award?keyword=arflex+200mg+bula+pdf PDF link annotation
    • http://teroved.22web.org/who_is_the_voice_of_the_female_mandalorian.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/how_do_i_light_the_pilot_on_my_gas_oven.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489237/normal_6044f5670b706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5fd5efe3c17d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_60277358cd661.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_603865f4b6dbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_6036f49688ce5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412575/normal_602141a9c86bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375206/normal_603169737562b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468837/normal_600118453b0be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461485/normal_5fe5f1464b8ad.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/kalefidewuxozibor.pdfIn PDF document text
    • http://xasujaru.22web.org/dabamerakipudigivebiwubig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://waroxudon.epizy.com/nasumezelisojalazi.pdfIn PDF document text
    • http://tarojiwisow.rf.gd/bumizev.pdfIn PDF document text
    • http://mulozeraxepe.epizy.com/rental_contract_template_egypt.pdfIn PDF document text
    • http://fuzonojidufube.epizy.com/fesuzemidejitefu.pdfIn PDF document text
    • http://werufofewusil.epizy.com/atf_box_setup_driver_free.pdfIn PDF document text
    • http://xegubidutanaza.epizy.com/61453218053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ed85588-73cb-4aa7-91af-07d85bbe7764/vewezukafanuzijirojovidub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d33a4075-915b-4f98-acc6-d3f1bf6c904d/bronica_etrs_without_battery.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001740c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1740C 5656 bytes
SHA-256: 9d4020c85c50cb7dd8c65a343f2573a26a5f3efd3a17850d96d4e1f964084365
font_01_sfnt_off0001873a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1873A 14260 bytes
SHA-256: 2de523eac939188c90ddd5bcc541182ef23201105f52aae65fe1ddedfbb3d967
font_02_sfnt_off0001b221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B221 16136 bytes
SHA-256: 4a82d930af4ff3021f3d19cbd37464c8e664c90bef13661c9db69df894853898

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