Malicious PDF — malware analysis report

Static analysis result for SHA-256 32fa052d25f2166b…

MALICIOUS

PDF

79.6 KB Created: 2021-09-06 02:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 80fd556827cbdb5c493c7df57f5cf40f SHA-1: c9fa5ec1e31187ab7440483b0802f214ff75031b SHA-256: 32fa052d25f2166b9b01ce258f493cd22acfdc5326b3eec73a22489c7bd58008
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on disposable domains or compromised CMS upload storage, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the links and the PDF structure point towards a malicious document, likely delivered as a spearphishing attachment.

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 https://allytemp.ru/uplcv?utm_term=converter+pdf+para+word+on+line PDF link annotation
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/kalogurisuwujopupa.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/18061697304.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608098677f522---kulonakusirezasagobibosu.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/tetevipuvujuxufedadajete.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/11143707818.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/lidekovakuf.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/8cd71bd61380c900ef2224ca4d31e774/fusixapixapuxivek.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/93566640074.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/678170f5b16e4a73b6b251180a4b656a/kenol.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/nekomopem.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/90550894196.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1613035c79ec10---tejubejunoluboxi.pdfIn PDF document text
    • http://gokea.org/upload/editor/files/22768398939.pdfIn PDF document text
    • http://explosivedevices.ru/media/file/75949283483.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612343c420192---28843899481.pdfIn PDF document text
    • http://pataibicaj.hu/userfiles/file/petalidakimowuvitavo.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/7528da539d4396a44ba7cdc601060bbf/32004973082.pdfIn PDF document text
    • https://ans5680.preneed91.com/upload/files/zuwitona.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5056b3cc5---98080461240.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/nuroxokebasag.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f528ac50ec---vexunozifuvubonaf.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/xorapijazopoda.pdfIn PDF document text
    • https://peoplehelppeople.net/uploads/File/41348618665.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/81657625138.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_off0000cdf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60F 10508 bytes
SHA-256: 91835f4ecb26b625bd69fe84737e02152b7e4084a9dfdfc4db26371b1f73a518
font_02_sfnt_off0000fe1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1F 19468 bytes
SHA-256: 14396993f74775c0d69980ecfeb4182d7c2198e4711271f888cb5e5767f2f830

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