Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5883292f2a887f3…

MALICIOUS

PDF

96.2 KB Created: 2021-01-31 18:46:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: beebe48083e463974314cceaccfce862 SHA-1: 78da70562153786bf5ee60032554e685db3d20fc SHA-256: e5883292f2a887f346dc002e11390edc543ad4041be3ada372c708e9269a85af
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lead users to harmful content.

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://seumenha.ru/123?utm_term=aa+meetings+utah+valley PDF link annotation
    • https://cdn.sqhk.co/fekigimuzib/gdfnkii/the_sims_freeplay_mod_apk_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456686/normal_5fec3a6c807bc.pdfIn PDF document text
    • http://gouliwer.online/lunar_eclipse_worksheetc1c25.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/ihsisB4/boxcryptor_mac_review.pdfIn PDF document text
    • https://cdn.sqhk.co/sunawopi/dcic6ih/85784792602.pdfIn PDF document text
    • http://espaceabone.com/xukalezagiguvutyiyh.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/fieidSo/gadabil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449766/normal_6002705da91e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zumijuxuv.epizy.com/73503389675.pdfIn PDF document text
    • http://penoputibilexo.rf.gd/ar_rahman_tamil_songs_collection.pdfIn PDF document text
    • http://suzurexitumafod.epizy.com/save_layout_template_autocad.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/bang_bang_movie_telugu.pdfIn PDF document text
    • http://nesowoxaxisaxa.rf.gd/jumepibe.pdfIn PDF document text
    • http://sijelufuzarolup.epizy.com/autodesk_revit_architecture_student.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00014174.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14174 27696 bytes
SHA-256: bb8ab1dba91a2a00a84771ffcd2bbc9c4731ff24d0a84f29a0dea8883da3c580
font_00_sfnt_off00010d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D50 5156 bytes
SHA-256: 36dcccfd62b84b0b9600b139e8aca0e2b86f286202d3894d8cd1f0fcc70e420d
font_01_sfnt_off00011ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECE 10244 bytes
SHA-256: fcd8273852110b03bb783a01b2108c8f23c8864b2bb88444d530aca5f9a8462b

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