Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9cb12ab8abfe41…

MALICIOUS

PDF

81.8 KB Created: 2021-03-18 18:03:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cf14ce031b7739175ff4e323384e50d1 SHA-1: 082276443c68e566421a82944be41295a41e7a2b SHA-256: ae9cb12ab8abfe41acc37b664847d19ab63269bfce322b6e6acdef6260f4bcc9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document body, though partially obfuscated, contains references to 'kitchenaid mixers' and includes numerous embedded URLs pointing to disposable hosting, suggesting a phishing or malware distribution lure. The presence of external URIs and link farm characteristics further supports a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=what+sizes+do+kitchenaid+mixers+come+in PDF link annotation
    • http://lokubakodo.getenjoyment.net/which_is_better_kitchenaid_or_kenwood.pdfIn PDF document text
    • http://coolvdomaion.online/juxibare66w8a.pdfIn PDF document text
    • http://susarivusu.22web.org/18979052915.pdfIn PDF document text
    • http://xtina.online/3259623711rxbld.pdfIn PDF document text
    • http://pokinusuvato.getenjoyment.net/1925174151.pdfIn PDF document text
    • http://daddytestit.xyz/53872496436usfwt.pdfIn PDF document text
    • http://sunny-web.ru/71531254803egjn3.pdfIn PDF document text
    • http://carinsrates.com/equivalent_ratios_practice_worksheet4gd4v.pdfIn PDF document text
    • http://koxivesuvif.mypressonline.com/sijojoriwenilenusu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/45124116-ff10-46b2-b730-4c80dba5e044/rajeki.pdfIn PDF document text
    • http://senesijosezetu.myartsonline.com/book_of_mormon_central_2_nephi_31-33.pdfIn PDF document text
    • http://gawasaxe.epizy.com/sublime_text_3_sql_formatter.pdfIn PDF document text
    • http://xawukagolu.epizy.com/kixarijeritimexoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db5bc14-9514-4677-9813-272bf7c67c11/fibojinaxigak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db3a55bc-7b01-41af-9884-80caa94fef94/kemoga.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA40 5344 bytes
SHA-256: d534dad0f34f3a1f1be45f85a94fde25b48f45e692526261d81563e93fb58b6e
font_01_sfnt_off0000fc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC57 12320 bytes
SHA-256: 85d788dcf9c3c63e9ab8ec6b217bf3984fb5d5d9af9d5a1d35ce428214597b80
font_02_sfnt_off000124de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DE 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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