Malicious PDF — malware analysis report

Static analysis result for SHA-256 88770639d01b9fbd…

MALICIOUS

PDF

74.3 KB Created: 2021-02-27 23:56:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5e2620648ced3a1afd4b6bbb42ad4fd1 SHA-1: 7b8101d4fa6082856ca40da3646afdcc3b656d18 SHA-256: 88770639d01b9fbd0b5ba3e75cce55b8f2fae3c892b1ca2dcec958c541da4c3a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure, likely designed to redirect users to malicious sites.

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://lozipotod.ru/award?keyword=dyson+v6+motorhead+model+number PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496602/normal_5feb983368377.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/laptop_price_in_nepal_acer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_60326cbd7e7d8.pdfIn PDF document text
    • http://rotepojisox.iblogger.org/kenmore_ultra_wash_dishwasher_665_not_draining.pdfIn PDF document text
    • http://finansi-7.online/where_can_i_donate_baby_equipment3cdhg.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/hetgibI/charge_apple_pencil_2_without_ipad.pdfIn PDF document text
    • http://sberbank.services/593805038922621b.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/ghi6idJ/avengers_xbox_1.pdfIn PDF document text
    • https://cdn.sqhk.co/femuzetoj/cQjijic/online_bill_check_gepco.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/68422001610.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/denewa.pdfIn PDF document text
    • http://wordsideget.top/autocad_2016_free_download_with_crack_64_bitkr8bh.pdfIn PDF document text
    • https://cdn.sqhk.co/susotizakaxe/hUvOzjb/funny_tiktok_sounds_for_dogs.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/blogging_for_dummies_2018.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/vubamobupem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://forubav.rf.gd/58554048317.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_off0000e514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 5520 bytes
SHA-256: cead56b878bab1797b9f739aad2662f23fe092f00956909e50383e22fa6f29fd
font_01_sfnt_off0000f7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B7 10596 bytes
SHA-256: 296bedcb3a1c40580cea677f555d17fade50ddd390d35451bd2cdbfc4416f96a

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