Malicious PDF — malware analysis report

Static analysis result for SHA-256 9205c362a48a847d…

MALICIOUS

PDF

79.1 KB Created: 2021-05-16 11:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3323d056cda23487315f3d4eaafa74ab SHA-1: 7868ee5ebc934c2d955a5b516cd01bf6fe3c2b47 SHA-256: 9205c362a48a847daee5c36e8312e48a8f2100ba9f3cae843dd2ea0de2125b53
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a search query, directing users to a potentially malicious URL.

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://xajibur.ru/strik?utm_term=apa+itu+frappuccino+starbucks PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495975/normal_5fd0df65dfda5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_6010005756d37.pdfIn PDF document text
    • http://shoop-fg.ru/metal_gear_rising_revengeance_apkherewn9f0.pdfIn PDF document text
    • http://jiwimejikigigu.mywebcommunity.org/cambio_climatico_en_guatemala_2020.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/vejivakaveg.pdfIn PDF document text
    • http://igclienteam.com/gezizuxezafikswnn.pdfIn PDF document text
    • http://jujokifenake.22web.org/microsoft_sql_server_2012_standard_iso_download.pdfIn PDF document text
    • http://whalesqpa.fun/681238203810v9bz.pdfIn PDF document text
    • http://uaportal.site/31982186748u3q2q.pdfIn PDF document text
    • http://lakuberik.mywebcommunity.org/tegosajafikuz.pdfIn PDF document text
    • http://zajiledafalam.getenjoyment.net/questes_organizao_da_administrao_pblica.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369671/normal_602fe02f0765f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_60303fd2c5baa.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/how_to_find_the_discontinuity_of_a_piecewise_functionzq5jh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_601fb6035ae34.pdfIn PDF document text
    • http://tuzirawejaw.mypressonline.com/lenipagupirejomu.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/51d92d17-7ba9-447b-b5ed-e804e91724f4/79287924900.pdfIn PDF document text
    • http://lafanibawonol.rf.gd/kogizozi.pdfIn PDF document text
    • http://gedanenek.epizy.com/fewawadimaxemeline.pdfIn PDF document text
    • http://tavawefojob.epizy.com/input_type_file_upload.pdfIn PDF document text
    • http://depimakari.epizy.com/mamajumorisibopasi.pdfIn PDF document text
    • http://xeropejuw.rf.gd/gejala_bronkiektasis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d629712-c83b-431c-9d3b-40f8f2ed2b07/why_is_my_carb_not_getting_gas.pdfIn PDF document text
    • http://tixelupaninaber.rf.gd/on_my_way_instrumental_ringtone_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF503 5172 bytes
SHA-256: f04e2464895dfad4a16c6eab6f8b3f610c16fd1f1c348d577966cf3248c05304
font_01_sfnt_off000106aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AA 11876 bytes
SHA-256: 0a07af6b8095c9b66a0b7fe1f74d8d6bb36f61ec2a88a2bb7b5a25f46372afe7

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