Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a2be59db40d5dbd…

MALICIOUS

PDF

75.8 KB Created: 2021-03-10 08:16:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d65832410a5637af8fe6a786bec16e5c SHA-1: dfd00fb6775ffd812d1686694d8f68e7028c288f SHA-256: 8a2be59db40d5dbdb259028dc18515f38c75c91a0c7bb4027aa7200238aa2fa1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a potential phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

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
  • 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://leonvi.ru/award?keyword=autobiography+of+a+tree+in+1000+words+pdf PDF link annotation
    • https://wunanowadile.weebly.com/uploads/1/3/4/6/134600652/mifebibubepox.pdfIn PDF document text
    • http://pasoxegidameso.iblogger.org/foxawoxigozadaluzed.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/the_quadratic_formula_worksheet_math_aids_answer_key.pdfIn PDF document text
    • http://zitugaxusi.mygamesonline.org/focusrite_scarlett_2i4_2nd_gen_usb_audio_interface_with_pro_tools.pdfIn PDF document text
    • http://xadexawufomovi.sportsontheweb.net/zelusifipar.pdfIn PDF document text
    • http://vavazexowupex.medianewsonline.com/watch_the_mortal_instruments_city_of_bones_trailer.pdfIn PDF document text
    • https://sebumeganajili.weebly.com/uploads/1/3/0/8/130874272/zuwitubatumutobox.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/44cfe023-d3f7-4d4d-9e5f-15905dca2689/54002636194.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/48207411181.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/42307486767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891f1f37-1a95-4e6c-87a6-ad20880faeaa/68862824156.pdfIn PDF document text
    • http://nupakavidowux.epizy.com/gagewabopib.pdfIn PDF document text
    • http://pizitibasowu.atwebpages.com/66251856472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f717b410-d3c1-479a-9fdf-63f608e69791/jugatolapatotibotufokedub.pdfIn PDF document text
    • http://nibopinalilabaj.onlinewebshop.net/subofugivuguji.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/22687476303.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/161415687.pdfIn PDF document text
    • http://vawirir.atwebpages.com/biodata_format_for_marriage_in_marathi_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b0852d-1ccb-490f-a814-a118b8a80140/39875718108.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_off0000ebcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCF 5788 bytes
SHA-256: b103f809b3533c9670fc29a2b9ffd8e935f0559bca23ec331c50db75795065bd
font_01_sfnt_off0000ff9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9A 9988 bytes
SHA-256: 9b3dc2da4a6d1d992a3e188706a3a9cf9982c41d6d685df91f52a0350bf79f88

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