Malicious PDF — malware analysis report

Static analysis result for SHA-256 85362c924791aca6…

MALICIOUS

PDF

73.7 KB Created: 2021-03-27 17:06:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0011e9292a28a6bd7e22eb6fa50de04c SHA-1: 20fb3aa39ec07e1fdff3bee66ed9a611af1a6089 SHA-256: 85362c924791aca6e144b8872ce66f84f08c944df9050df8808b2bb9c1a87211
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 embedded URLs, with a primary suspicious URL pointing to 'lozipotod.ru'. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggests the PDF is designed to host many links on disposable domains, a common tactic for distributing malware or conducting phishing campaigns. No scripts were extracted, but the presence of external URIs and the link farm heuristic strongly suggest a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=dream+of+a+common+language+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469350/normal_60344546ecb89.pdfIn PDF document text
    • http://ritual-venki.online/fearless_youtuber_diedf6dcx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426815/normal_5fe268c36c245.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/taxafemigi6iltj.pdfIn PDF document text
    • http://yesitalia.fun/lutuxinoxibakokonufagipesvw5xk.pdfIn PDF document text
    • http://fragcups.com/where_to_buy_petsafe_wireless_fencefrfdp.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/ib2jbhg/jezubub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446647/normal_60129648d52ec.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/ghXjcjd/transparent_phone_screen_downloads.pdfIn PDF document text
    • http://karma-911.com/217728802884fjcc.pdfIn PDF document text
    • http://puditutado.22web.org/malcolm_baldrige_modelo.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/ekcVyhe/smart_balance_wheel_price_in_dubai.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/assassin_s_creed_unity_android_ppsspp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f80660-563d-49e5-9d9b-7af2a89e32f1/13684470085.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/63873760700.pdfIn PDF document text
    • http://julivaradisakit.rf.gd/bisetuxal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f57f43ed-0850-49c1-a946-c14d8194e502/how_to_use_a_miter_box_and_hand_saw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c86c63-0451-419e-a6a0-1def4584b216/how_to_undo_page_break_in_word_2007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e09464f-a4c5-4574-9934-7b1eddbb52ca/jiwegopilagosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6af4bb-daec-4185-ae7d-04ff97203294/where_is_jaycee_dugard_now.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_off0000e47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47D 5296 bytes
SHA-256: 116317b4d5b62d6408a730a79565b05a124fc46731ac8b47aed99c5c6aa1c50d
font_01_sfnt_off0000f673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF673 10300 bytes
SHA-256: d122c6bfa31bb87b32814c7f50a7ad3349559243eabf16499d5c2762df49b4a8

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