Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef48476a5df12ce…

MALICIOUS

PDF

72.0 KB Created: 2021-02-14 09:26:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 37a10fff527a01141e76cfd5143b4b51 SHA-1: 97baeebf2795175f668215f7e8703b013a8370cd SHA-256: 2ef48476a5df12cea332aa5281b0991db1387e1e652a27edf1d80b02e287e9de
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://baarspo.ru/wix?keyword=lined+seahorse+care PDF link annotation
    • https://cdn.sqhk.co/rozopebak/fieHgjP/1789873273.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/hjiahg0/70354012333.pdfIn PDF document text
    • http://artelamp.store/mejufogebusirogaxenitezart8mkv.pdfIn PDF document text
    • https://cdn.sqhk.co/wixadigizal/rnhbXjj/full_quran_translation_in_english_download.pdfIn PDF document text
    • http://remontlegko.info/vavezirotduqtk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375522/normal_600084e0d0d59.pdfIn PDF document text
    • https://cdn.sqhk.co/vituxezij/fjeREzs/20027092608.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407781/normal_5fe5e1551e8d2.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/zuxudam2bozf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491665/normal_5fe1f8e5c6d28.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/DhQAlhj/4156759764.pdfIn PDF document text
    • http://bella24.xyz/ap_stylebook_2017h3v84.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/musoxifuvitalo/wafizolas.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/gufejoguxat.pdfIn PDF document text
    • http://sowawobajomo.rf.gd/65043162052.pdfIn PDF document text
    • http://rilokew.rf.gd/sirumijuraput.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/42723687247.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/laxesokixat.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_off0000d26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26A 4644 bytes
SHA-256: 7258a3275c719a60c942e5bd5fde0a6e8fe56c6b3017a05904cb70ef2971f0ee
font_01_sfnt_off0000e218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE218 10288 bytes
SHA-256: 0a76f70b22884a1df669b626538b141377f45d479221440f3e9233930c214aa5
font_02_sfnt_off00010505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10505 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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