Malicious PDF — malware analysis report

Static analysis result for SHA-256 9084c4cae4b59874…

MALICIOUS

PDF

74.8 KB Created: 2021-02-14 17:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: efabbef64c13195c1e9c4fe5fcb76e20 SHA-1: 742b4cff09405e9904f2dbad46cc973a00b7b1dd SHA-256: 9084c4cae4b59874db4366a90c57a4ed30896a661788c4593b1a5d1b4bf49b86
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and hosted on link farms, indicating a phishing or SEO scam. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/wb?keyword=weather%20report%20bullhead%20city%20arizona PDF link annotation
    • https://cdn.sqhk.co/boguzivipel/ubhDhdi/vufonilusobumor.pdfIn PDF document text
    • https://ximazaka.weebly.com/uploads/1/3/2/7/132712593/db2fbf3581.pdfIn PDF document text
    • https://pisaxegeb.weebly.com/uploads/1/3/0/7/130775455/5032966.pdfIn PDF document text
    • https://fipamowusaki.weebly.com/uploads/1/3/4/8/134879766/nolitukaz.pdfIn PDF document text
    • https://sokuvefababadax.weebly.com/uploads/1/3/1/8/131856373/899523.pdfIn PDF document text
    • https://muwujexowosis.weebly.com/uploads/1/3/1/4/131437891/gerawoxefepiva-gowafi.pdfIn PDF document text
    • http://mantenancie.com/dapufibumibunobesuxasix24a7v.pdfIn PDF document text
    • http://mosoxiliraf.iblogger.org/14154802480.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/jbgihcV/free_kick_goals_record_list.pdfIn PDF document text
    • http://xuratalusat.22web.org/buxepufagadagexeramu.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/6702635.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/jjjgiji/feromava.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/bevekizadoxuj/fewoz.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/kifadedig.pdfIn PDF document text
    • http://xawisis.rf.gd/3_branches_of_government_study_guide_quizlet.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/mediheal_bubble_sheet_mask_review.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_off0000d946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD946 5168 bytes
SHA-256: f23834bf6da05308c79fd6de38f8b9d083f426ae3ece40e206aba9603bb7c18a
font_01_sfnt_off0000eadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADD 10956 bytes
SHA-256: a7b10ce902e1c0273699adafc944eb296b108a2fd2536661fe5ad1676eaa494d
font_02_sfnt_off00011013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11013 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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