Malicious PDF — malware analysis report

Static analysis result for SHA-256 d147eae26beecea2…

MALICIOUS

PDF

115.4 KB Created: 2021-09-01 05:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7828f7a485fb0dc63f8a4d4a2918ab5a SHA-1: df8663551332943a1c938c189d20b370f7464830 SHA-256: d147eae26beecea23c03a2e2f66ddea3654848b6c0f25a27961e14d676290fb5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing to numerous URLs, many hosted on compromised CMS platforms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://stacjaregeneracja.pl/userfiles/file/fiduvuwodelenanojewotal.pdf In PDF document text
    • http://hanabi-la.com/uploads/files/18728310320.pdfIn PDF document text
    • http://datev.hu/ckfinder/userfiles/files/lupeg.pdfIn PDF document text
    • https://chptravel.ir/data/file/demizixekod.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/sowuviwile.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/e63b976ede217181455c19b041c031ee/14224202358.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/texuwebagapifukaxipawo.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/c131b8a70285c368a0fd1d33a878d621/soduj.pdfIn PDF document text
    • http://henca.com/files/details/file/wafopizugaporasen.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/26b74fe494b4fd81d0bbb681ff1c15ba/34725756340.pdfIn PDF document text
    • http://nfc.soo.jp/file/94558288396.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/2895f0h55r8kvth5fke66ben03/nabevekoxetovegusopaduwuj.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161197fca531bf---66159891573.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/46f959acdedb2532924655d8b85bacf0/76943438353.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/vonurixot.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16091bb225bc27---jorikupexafofigitominit.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f86dbc75925---nowagipaso.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/rfnf9iqg4pp7b236dua63fig33/firufololoralenemeji.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161075b798381d---28479997334.pdfIn PDF document text
    • http://brukikostka.pl/uploads/page/file/60307015213.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9f5066f02f31783c6872cd42679ad843/67452963427.pdfIn PDF document text
    • http://innotack.com/userfiles/files/rikuxatogotad.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/bapidof.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/fdd4554559d26fd50a5c3049fa93bc9d/23431416705.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/75864547931.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=plagiarism+checker+15+000+words+freePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001723f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1723F 19780 bytes
SHA-256: 66f753234fea1e6f7fcd2146123ab62c92c6796388c4b223fc5c6e5ed39d8e8b
font_02_sfnt_off0001a581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A581 11208 bytes
SHA-256: bcbaa2192d7906ad0eb4608ca9b73ab1d9a551dde5fc85d82f04c4f14aff25b4

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