Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b34d2149a22de5e…

MALICIOUS

PDF

82.3 KB Created: 2021-09-10 06:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 48a4622774cc497444013f2459359800 SHA-1: ca9cb7a02ef28d8bf8c71e3378c09f9acee91673 SHA-256: 2b34d2149a22de5e28068f53c0178aabe317961100a7ff26aec4276fa1a090bb
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crysiq.ru/uplcv?utm_term=amazing+ringtones+for+android PDF link annotation
    • http://studiorapizza.it/userfiles/files/guxewadeg.pdfIn PDF document text
    • https://dawnraytech.985.tw/data/file/userfiles/files/ponabividawapeginipe.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/94357330970.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/86215801415.pdfIn PDF document text
    • https://rubfila.in/files/file/rozelebasevibasa.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/puzipozumozamusujexise.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/zavesip.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab0bbee7e3---41113515566.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/3573455328.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/13789344330.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/tigatujutagidoxodeta.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/bumop.pdfIn PDF document text
    • https://motiwalainstitutes.org/userfiles/file/48585964657.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/mobegemiwapejosidenop.pdfIn PDF document text
    • http://yidaig.com/uploadfile/file/20210902231813.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/nabaneragakabesexuxifite.pdfIn PDF document text
    • http://eternoohydro.com/d/files/voveri.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161348b85a0a34---6715554706.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/zaziposawotutuz.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/44268345207.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/tokoxun.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139dfc227ea0---pegamojun.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/sezotefobuguv.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/75865435501.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/62504514024.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161398d5a0ec77---52457428915.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://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_off0000dd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9E 17396 bytes
SHA-256: 5a0bfe7d209cfe5772ec90b5bc102f947ae8c25ada68143f0bcfa0a343550556
font_01_sfnt_off00010aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACA 10692 bytes
SHA-256: 9469253c08698ed3ae7155055a580036d9c0bdd09332fcf9d362986c7125c940
font_02_sfnt_off0001232a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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