Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb7cf1a6a930b213…

MALICIOUS

PDF

87.5 KB Created: 2021-09-01 12:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7d18458f68aa1d51c9c229a240290827 SHA-1: b15c23701387cb8877a7a26c5f98282658199b05 SHA-256: bb7cf1a6a930b213ebe8d0929a8c6dc156456a60cc4763a87cec3204ae5f598a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating the document is part of a link farm designed to obscure malicious destinations. No scripts were extracted, but the overall structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://catamma.ru/uplcv?utm_term=sharp+pain+side+of+stomach PDF link annotation
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/rbr5g685epbfprv1ccb8n6ibg5/mumipitojifitizoropatizup.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/fozokevivulivaronoxatul.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/jetewulotobesonejonozozag.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/mgbngeeohvh95dst9d7o4f0lum/38008823337.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1630083924.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a278e3b80bd---relale.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc45470236---nasurikowadafesuxupofixuj.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/dosopak.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160f7374d4ac03---velopovexedudelulalesejo.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/70a56766d8ec162da21956ac0c6af716/vevedijotozetagelelev.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3dff036c3b---zarifoganativon.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/23223478776.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160dd776a3dc00---wapot.pdfIn PDF document text
    • http://maihome.hu/admin1/file/42941170891.pdfIn PDF document text
    • https://senhewood.com/d/files/19066072103.pdfIn PDF document text
    • https://activepymes.com/pub/file/61954379866.pdfIn PDF document text
    • https://www.speeddating.lt/speeddating/ckfinder/userfiles/files/19072434503.pdfIn PDF document text
    • https://anninhsieuthi.online/upload/files/60792155673.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b8816e61add---88347252567.pdfIn PDF document text
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/fdafbc399af33e57b2b1396afc106088/sotedisusomef.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae03b0cbecf---45369434346.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/vajumenenagamenud.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/gojalezagofutetidafedole.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_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF4 17704 bytes
SHA-256: 01b9de05381ba88f073dc7cbb376eaa26a1f2cf81fcb0c3354ca93bbdcda8dfa
font_02_sfnt_off000137fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FC 10912 bytes
SHA-256: 243709820a76af6291894835cea45079a94e6c041d0b3f1284933a0c938e5bd7

Open this report in the interactive analyzer, or submit your own file for analysis.