Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf22e46c3fcb2a40…

MALICIOUS

PDF

88.1 KB Created: 2021-04-08 19:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f439a1be7fb4a5e9b7fe4e8bae4622f6 SHA-1: 966cda41f1cddf107578c4f949186f15b086c52c SHA-256: cf22e46c3fcb2a40d8946bb8b3e2435d2a2eb071b73d8d776ee37e369ca9b7ef
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary malicious URL identified as a lure for game mod information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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=skyrim+xbox+mod+load+order+list
    • https://static.s123-cdn-static.com/uploads/4375087/normal_5fec1e2443046.pdf
    • https://cdn.sqhk.co/seworani/mhbgcjj/jazevujopas.pdf
    • https://cdn.sqhk.co/rasetiwulipu/njhiamm/ticket_to_ride_more_tickets_list.pdf
    • http://joweponula.mywebcommunity.org/41444259540.pdf
    • https://cdn-cms.f-static.net/uploads/4416934/normal_601495880e3a3.pdf
    • https://cdn.sqhk.co/wajidafix/LWyjbpp/wexefedebekuvovipebasib.pdf
    • https://jotafatebukuzeb.weebly.com/uploads/1/3/0/7/130776674/nasaxirufifasi.pdf
    • https://vekaforu.weebly.com/uploads/1/3/4/7/134747957/ketag.pdf
    • http://vexetifiridik.mypressonline.com/96584643344.pdf
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/7795744.pdf
    • https://mazogerivajusem.weebly.com/uploads/1/3/4/3/134341978/kuluzopixitakuxe.pdf
    • https://cdn-cms.f-static.net/uploads/4448094/normal_6063fffcad635.pdf
    • https://cdn.sqhk.co/vujixete/jjPhc5n/idle_farming_empire_apk_mod.pdf
    • https://cdn-cms.f-static.net/uploads/4494657/normal_606c822dd84ad.pdf
    • http://zijozarub.mygamesonline.org/18142705500.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fiforeru.atwebpages.com/77323734337.pdf
    • http://likutolejit.onlinewebshop.net/yamaha_portable_grand_dgx_640_price.pdf
    • https://s3.amazonaws.com/kudowo/troy_bilt_5550_watt_generator_8550_starting_watts_manual.pdf
    • https://uploads.strikinglycdn.com/files/c8d35b30-e60d-4ef2-be4b-091ff1db04f2/dibesu.pdf
    • https://uploads.strikinglycdn.com/files/65ff6e0e-c235-417c-83be-711673ed0cea/bose_ae2w_manual.pdf
    • https://uploads.strikinglycdn.com/files/d88fc67c-bb0b-4467-9fdd-b7f6a25d8472/big_data_analysis_book.pdf
    • https://s3.amazonaws.com/suximawo/why_does_the_us_have_army_bases_in_germany.pdf
    • https://s3.amazonaws.com/lanaladu/15429799300.pdf
    • https://uploads.strikinglycdn.com/files/3563f206-84f2-4d4e-9898-49a266cbdb42/suparukipi.pdf
    • https://uploads.strikinglycdn.com/files/498e82ab-168d-4059-a902-362cbb01a703/vutawazigisiv.pdf
    • https://s3.amazonaws.com/fosalizuzu/mukokitixofitu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011840.bin
4213e4d95e557d242b13d1206ba43fa70001ac05d96dbbef97b87b05ee15912b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11840 5448 bytes
font_01_sfnt_off00012abb.bin
a0996ded330fd24d8d2ea3cc0ee3281888a085be12247bb205bbad057d68e47a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABB 11824 bytes

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