Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f97d24aae7af82…

MALICIOUS

PDF

75.7 KB Created: 2021-06-10 07:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e80f1ffe0b717a8f2dda9e09f5f86c9e SHA-1: e3122d024242a933c5b27dde1a7147da1e70e486 SHA-256: f9f97d24aae7af82bd8b824d1acb454527f2729deff8226fc937ca9a7f6d6a62
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or trojan distribution. It contains a link farm hosted on multiple compromised WordPress sites, with one URL specifically mentioning 'shadow fight 2 special hack' as a lure. The presence of numerous external URIs and a link farm structure suggests an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nomylo.ru/uplcv?utm_term=shadow+fight+2+special+hack PDF link annotation
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607806a711968---jasatusuxarevelesoturoxib.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088a22829a86---89017921263.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2cfc14374---64722672838.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/5c0b774ca943b7729c33e97043ca3cdb/89171752920.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609e64253ef8b---kipokinoxu.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7a2184b02---69075996118.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714ef0438d5---11834492055.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/16p4dsllicejtug67rm8fagop9/99211967653.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae2ed1babe---tusinopi.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/f11f5eb76a3fa24a141aa0d54359f7bf/warutemaruvapukegadinaf.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/9fb695fbe48a0bc351aecc630c40bbfb/72767475992.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/puranadexafabuk.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/qactnbqgc3d9fvekdp19tgqm2k/megetuxojurofevug.pdfIn PDF document text
    • https://senhewood.com/d/files/19066072103.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/ujvimb5g7h2hi79bg9caklhtlb/25609579964.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b21a26390---97359520256.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705a2c05645---61451519180.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16099caee2a308---71129507594.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB40 5712 bytes
SHA-256: 22a91271f128c9f96316eeaa0fe19222169d6584c0481c9d8168be8c6b7b3b38
font_01_sfnt_off0000fed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED6 10128 bytes
SHA-256: cdc96a897704b8da459db0af04bc6d311153962cf8635ba0919609c02ac0f3bc

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