Malicious PDF — malware analysis report

Static analysis result for SHA-256 41416118af9913f4…

MALICIOUS

PDF

68.3 KB Created: 2021-03-03 20:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: c7c4ad23f539441b967908615b24de08 SHA-1: 7c877e5fa0dea7cd1ac5034abdf10f25f5dacaf7 SHA-256: 41416118af9913f41aab3b90344ad8a4073733e0aeca0082c35d3a52414c0cc0
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on a URL related to car maintenance information, which is likely a lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for such lures. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware.

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://mezovuduw.ru/strik?utm_term=2004+chevy+malibu+maxx+oil+type PDF link annotation
    • http://lebepufu.mypressonline.com/kevexoborikadan.pdfIn PDF document text
    • http://kfcrabota.ru/videoder_14._2_for_pc7evtk.pdfIn PDF document text
    • http://secureappeal.com/xidomosagi9ej46.pdfIn PDF document text
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/4147839.pdfIn PDF document text
    • https://todurudivi.weebly.com/uploads/1/3/4/3/134344361/gunudefusi_tudagewepezuzu.pdfIn PDF document text
    • http://kofojoxake.mygamesonline.org/what_do_explosive_workouts_do.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449774/normal_602d818ff049b.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/xefapovojarusakuzuzusaz.pdfIn PDF document text
    • https://ziziwatir.weebly.com/uploads/1/3/4/7/134713039/5670616.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nagev/steps_to_perform_cpr_american_heart_association.pdfIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/how_to_do_naruto_hand_signs_fast.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/collins_easy_learning_english.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/the_open_road_movie_trailer.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/is_vedic_astrology_more_accurate_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/23887419514.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D4 5312 bytes
SHA-256: decf63f66e34acea0d4a170f9e9aeff56bcd208cf518e1b97d5841ae4aa8d28a
font_01_sfnt_off0000d2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F3 10336 bytes
SHA-256: 6ace4002585522dce9c4e3e1c1e7752912dacdd097df68a326ee986035708539
font_02_sfnt_off0000f63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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