Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c5e7852d030bfa…

MALICIOUS

PDF

76.5 KB Created: 2021-08-01 14:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e789bb2cbd89ce1d3a7ba2989cccabf8 SHA-1: 3ed168a43d0ded3a031ab57fbd3af74b7b7a6400 SHA-256: 14c5e7852d030bfa76c793dc39c89cbc06b5d60716486fbc0d233799be4b02f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or SEO abuse campaign. Although no scripts were extracted, the embedded URLs are the primary indicators of compromise, likely leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/ca5f5b8bv3o1tuj67c2tmk2p00/ravigevive.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bea1011f4f0---minurisegat.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/9e8a8dead8a34bb88dabfe2623242f95/livatokugadurugisupuxa.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b353c0467c0---sawaleguloratijaw.pdf
    • http://batiment-tunisie.com/userfiles/file/gidibukuvetovubakivoka.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d61d1c2eed.pdf
    • https://computerzone.pk/file/48011931235.pdf
    • https://bettyloupaints.com/userfiles/files/72824697017.pdf
    • https://hyosungulf.com/uploads/file/70644588412.pdf
    • https://anjingliar2.com/contents//files/64365265947.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/eecfc6713f86d50fffd0b0c342d914d4/fotowokazuwapadazukafat.pdf
    • http://portalcom-b2b.es/img/user///file/_0812873001620100776.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/3a7c825951dcbc2116c66d757f818380/gabutisojutojotumazixar.pdf
    • http://scvumaichiramen.com/uploads/files/30829736486.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/1d46c9946a343dfc59742f0492ab499e/60492868551.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1610478c765eae---41189385893.pdf
    • http://leebyunghun.kr/new/upload/board/files/dimaruve.pdf
    • http://kulturazebrak.cz/userfiles/22101580588.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2696151da---zewajasuwolowarevilebusaz.pdf
    • http://ylgems.com/file_media/file_image/file/titox.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d954a4bafd---5938540082.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/f9c20105ceacee0dd29f9ddceef3efc5/70434456805.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb696b3033---25919489883.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=linear+equations+practice+test+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c552.bin
6f692c85e26c48fe46354b4db2e3fa78b9a3d4bdb8e78d7c7dd9dcea6a3a2bc9
pdf-font-stream PDF embedded font (sfnt) at offset 0xC552 17132 bytes
font_01_sfnt_off0000f1ce.bin
b4d55927ff3ff31d896b7a229580319e554d07a4eab52f7846faa6250048a64d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CE 10612 bytes
font_02_sfnt_off00010a44.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A44 16792 bytes