Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd75cb75faa9b4a4…

MALICIOUS

PDF

72.0 KB Created: 2021-02-26 16:54:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8f4e6e220bbe447cb2cab85e71f8c8c9 SHA-1: 4237be3beb441be842999c2c878f669f4e90b1fc SHA-256: dd75cb75faa9b4a4d5d3c743340d317550077d0941bc1f4e3b47e7b4d8738335
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, suggests a lure related to a 'Lenovo ix2 quick start guide'. The embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirm the presence of a link farm designed to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/award?keyword=lenovo+ix2+quick+start+guide PDF link annotation
    • http://item-get.top/q6f_refresh_ratew4ovy.pdfIn PDF document text
    • https://xifemobagot.weebly.com/uploads/1/3/4/0/134000541/4096216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384145/normal_60216e0f9b176.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/msi_afterburner_win_1073xf1.pdfIn PDF document text
    • http://furniture21.online/is_there_going_to_be_a_new_harry_potter_booky1orz.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/RTighgf/mysejahtera_check_in_premis.pdfIn PDF document text
    • https://bukodebavuv.weebly.com/uploads/1/3/4/6/134657655/a4c05fa.pdfIn PDF document text
    • http://olimpcargo.ru/happy_birthday_cake_topper_party_cityki5uq.pdfIn PDF document text
    • https://xovisifolato.weebly.com/uploads/1/3/0/8/130814526/merojofedagaravizo.pdfIn PDF document text
    • https://rowigoto.weebly.com/uploads/1/3/0/8/130813427/5401006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486523/normal_5fe64a689a3d4.pdfIn PDF document text
    • http://reduslimitaly-official.site/the_sense_of_an_ending_explained0elbj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490001/normal_6020d0639aa6b.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/dudigonifu/25625106226.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/niwavupojixugenefajomifup.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_off0000dc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC32 5464 bytes
SHA-256: 619423d2c9850f11d6c9ca09d40c4db335308431643c36625699db00fd43c71a
font_01_sfnt_off0000eee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE3 10592 bytes
SHA-256: f77c3162d08d8b76203debdc6a80dab835e28e6f2d1f7b4979c6df8f91547e1d

Open this report in the interactive analyzer, or submit your own file for analysis.