Malicious PDF — malware analysis report

Static analysis result for SHA-256 14883d916c01f4b7…

MALICIOUS

PDF

76.4 KB Created: 2021-02-25 16:17:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 22c60023fffb4200619c16cb1bde27a4 SHA-1: 94de7902ae232acf468a0dd49435bed6b9cc3e24 SHA-256: 14883d916c01f4b760dfcefcfd3141253518d7ad61159749553b5e6df844640e
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous external URIs, including one that redirects to a disposable hosting domain, suggesting a link farm designed to obfuscate the final malicious destination. The document body, though heavily obfuscated, appears to be a lure related to interior design, likely to trick users into clicking the embedded links.

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://druttle.ru/123?utm_term=interior+design+basics+for+dummies+pdf PDF link annotation
    • http://sevezor.scienceontheweb.net/11748983750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_60210ec25edd4.pdfIn PDF document text
    • http://vuzuvolumupapiz.22web.org/european_journal_of_clinical_nutrition_author_guidelines.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412583/normal_5ff8a75e7fa17.pdfIn PDF document text
    • http://wifefavowe.iblogger.org/ponopazimimotexubafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446942/normal_5fdacefb1ce37.pdfIn PDF document text
    • http://ranefadosef.iblogger.org/jeditalura.pdfIn PDF document text
    • http://kefowawud.22web.org/1551872920.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/densidad_g_ml_a_g_cm3.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/sunbeam_electric_blanket_controller_bl0600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481527/normal_6024be6f95244.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wotanuxofewaru.rf.gd/aadhar_card_password_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/jumofowuzoziligizevaduj.pdfIn PDF document text
    • http://menenig.rf.gd/best_workout_for_over_40_female.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/lord_of_the_flies_important_quotes_chapter_1-3.pdfIn PDF document text
    • http://wigazimo.epizy.com/jingle_bell_christmas_song_audio.pdfIn PDF document text
    • http://kapigazezej.epizy.com/samsung_allshare_free.pdfIn PDF document text
    • http://pebulibupa.rf.gd/53084050015.pdfIn PDF document text
    • http://padijajuvon.rf.gd/85344956364.pdfIn PDF document text
    • http://wilafeduzavedew.epizy.com/12889693931.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_off0000edf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF0 5520 bytes
SHA-256: 593b63da78a70d89decc75a9e750bc910a48f6687e28118c8df2eede661611f4
font_01_sfnt_off0001009e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009E 10628 bytes
SHA-256: dfce64b81b42e4ebbf76f9986741799cba36d1b53f4a342722af1cbeb3071445

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