Malicious PDF — malware analysis report

Static analysis result for SHA-256 55a62da858a595fe…

MALICIOUS

PDF

78.2 KB Created: 2021-03-09 07:14:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00d6a9f93a379962d87cf12185bbed21 SHA-1: 5b5a7022d4b138922c28a318f39acefd2c8f5c78 SHA-256: 55a62da858a595fe1e433ae8181d48754d23701c2e660b8c04226093bce67172
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, identified by heuristics as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/123?utm_term=an%25C3%25A1lise+swot+defini%25C3%25A7%25C3%25A3o+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463286/normal_5fe8783d5d2a2.pdfIn PDF document text
    • https://cdn.sqhk.co/menodotitit/HvyEhcR/bein_sports_turkiye_satin_al.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425926/normal_5ffb6e0871e8c.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/HghQHjb/28958945624.pdfIn PDF document text
    • http://kudukudimox.sportsontheweb.net/rigonarajewarubel.pdfIn PDF document text
    • https://cdn.sqhk.co/gatavikap/mBifSVl/tijoruwap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411917/normal_60346b4923530.pdfIn PDF document text
    • http://rujakagixawimir.22web.org/my_sony_tv_flashes_red_6_times.pdfIn PDF document text
    • http://desokore.medianewsonline.com/fallout_4_graphics_mod_list_2020.pdfIn PDF document text
    • http://ruwosiju.getenjoyment.net/xerox_workcentre_7855_price_in_india.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405184/normal_5ffd3a2e83bd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_602c90b2c6a15.pdfIn PDF document text
    • http://gifuketedep.22web.org/pipukameresed.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/gdidhaq/lep_s_world_3_game_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/jjZdhgf/75667635170.pdfIn PDF document text
    • http://ruwufuwetoj.mygamesonline.org/gilunikajotibiv.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/cowfish_menu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_9ec0634f9d7c4fbaa0795f45ec409773.pdf?index=trueIn PDF document text
    • http://gakilasefit.myartsonline.com/75595171539.pdfIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_fb9671e6a99c42f18f761006bd32c6dc.pdf?index=trueIn PDF document text
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_26f93acd65a344bf8ebbd5ad4582babb.pdf?index=trueIn PDF document text
    • http://faxiruvud.myartsonline.com/genie_pro_screw_drive_learn_button_location.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/flysky_gt3b_review.pdfIn PDF document text
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_6e037ad73b8c4d119f9a30bb7dacbf83.pdf?index=trueIn 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_off0000edc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC0 5544 bytes
SHA-256: 87a9010a7e30e7d020ce646f96336746cd08211368d8fb6b1c5b6d41fed47020
font_01_sfnt_off00010028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10028 13400 bytes
SHA-256: b2c848e14639829408b0061bbc6bff0ddc98022f1775faf6d7c84f9b5c7c156d

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