Malicious PDF — malware analysis report

Static analysis result for SHA-256 d810379008bcbaa0…

MALICIOUS

PDF

84.7 KB Created: 2021-02-25 04:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8b4957d0b9e9302a0ead3e1b9971baec SHA-1: fe84760599aa98d0a68490b6963a55494b34172a SHA-256: d810379008bcbaa02fd1cf92023ede270ea299f65a366a165a3b9b60bd9b308c
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with at least one identified as a malicious redirector and many others forming a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution through these links. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=5+languages+of+apology In PDF document text
    • https://wekosidofanepa.weebly.com/uploads/1/3/2/6/132696212/tafar-lakowewifuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472783/normal_602c42baea50d.pdfIn PDF document text
    • https://werafapotavide.weebly.com/uploads/1/3/0/9/130969473/9671964.pdfIn PDF document text
    • http://mafaregasinuviv.22web.org/aquaculture_science_book.pdfIn PDF document text
    • https://nafezukame.weebly.com/uploads/1/3/2/3/132302716/5045086.pdfIn PDF document text
    • https://vabadagijuruka.weebly.com/uploads/1/3/1/8/131856539/kijadoteroxelaked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_600a7166b7165.pdfIn PDF document text
    • http://javoreruja.iblogger.org/free_excel_home_budget_template.pdfIn PDF document text
    • https://juxusuvib.weebly.com/uploads/1/3/0/7/130739690/bedagededimubo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fikuvine/vanguard_voo_etf_fact_sheet.pdfIn PDF document text
    • http://ligunatiresid.epizy.com/filmywap_bollywood_movies_bo.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/satofelimidoxetewune.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/zofozetigumugatixorapa.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/icse_10th_board_exam_2019_date_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/other_life_parents_guide.pdfIn PDF document text
    • http://rumapipenuwiwo.rf.gd/70168708521.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_off00010e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2C 5104 bytes
SHA-256: 2607ad6a81c1cf1004a6edb2a6baade30a89cf1f92c3d8c6cdbb3491e6ddd28b
font_01_sfnt_off00011fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAE 11360 bytes
SHA-256: 486120804f026cc6e03a6a0846434e187f43e3e4108ea7db334474ce90e560e0

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