Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcdcd086572ed148…

MALICIOUS

PDF

70.2 KB Created: 2021-09-07 20:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 33c9c749418398a9d7ff60aafd09f6dd SHA-1: ca00cc52dcdfe5e67bf347a78fdd29e667e70973 SHA-256: fcdcd086572ed148bd7029b726fbdd40a553497483269081fc13785e1f2b44e0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or manipulate search engine results. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://statsale.com/data/upload/ck/files/6611026893.pdf In PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/88470497971.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/91175311227.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/9eiasfl91ejae793ld23m3sk1v/gevolonovivaxaz.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/7ea6553c1cda391bee036e21173b959c/33119658068.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/gibikamusa.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/95229336826.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/ludebidono.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/2s10h96u1aiouidieccp1jnvf5/74478534318.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607488a32be5f---tonitojepexigujag.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/fezajimododalukupuwokoke.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/pt6crspd286kjhllns62ui4s4n/32407000189.pdfIn PDF document text
    • https://galaxy-training.com/userfiles/file/dafabezo.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/4b2be3860d8e15ec1f381ad724d24d1b/lunavata.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/bcaee0a414bde45756c6bcdc93f953aa/87638552889.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/vogoputas.pdfIn PDF document text
    • http://samtekelektrik.com/files/63730001397.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/sezesagigow.pdfIn PDF document text
    • http://coytex.net//ckfinder/userfiles/files/57279627351.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/4b5d2ab67157572aad7f152d7cc58136/jerixefivexoge.pdfIn PDF document text
    • http://cutskytools.com/d/files/wajojatovotovofup.pdfIn PDF document text
    • https://labelmarket.eu/data/file/9931009419.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160f3bc50c3ebf---xefiledagunu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=impact+of+teacher%27s+personality+on+student+learning+pdfPDF 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_off0000b2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B2 15200 bytes
SHA-256: b9e42db01b4857d7ec71070a434ee16bbc5bf3789e1c6dec73b778afc5812828
font_01_sfnt_off0000d8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AF 11268 bytes
SHA-256: c0914383da6cb7fc462ee37cce918f0518af9bda84537624551a20c993ef2e24
font_02_sfnt_off0000f2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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