Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad806ef8d297ff8…

MALICIOUS

PDF

82.9 KB Created: 2021-09-05 03:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a034289c84518f01ec640513f4032814 SHA-1: 94507834685199926f5ea12be83d0559bffcccd9 SHA-256: fad806ef8d297ff8bfb555e2020e8cbca488d34b504c081225a6421da8fd0832
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and link farms points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://huntic.ru/uplcv?utm_term=gender+equality+in+employment+pdf PDF link annotation
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdbe2ab11c---16664791194.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/dasigifituxejogilasuk.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/52521221783.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/40e694a31bbf7c432b4fc97fcfaa1b6c/ladesanolidojaburarib.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/51ce1f81b879c9a33900fe35b18c7ce7/bigoresakilevisej.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/3bbr6051u4ti5s78v0rc7a0qa4/wulujefawinofiwufepej.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085bdd1bf46b---paxalator.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/zupox.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/vobilokomil.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/cf188d746bb949bb202564dd67a85002/95529062510.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/sdo0101l23mngjprsgi7ftl9i3/rexekafuvurokakamobodozu.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/5858805605.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/ae0dcab443c4a737f3a19664dc18c298/44727191593.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/pekejijoredafapimogadow.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/woxivuvewalotejisiseza.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/f5a030761db670a0caed1e084f0eda22/67377448822.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708868888a2---48569553093.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/99037833495.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7cfe6a704---fegisukeduzot.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160de168965641---83317152300.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/h5rmjvrk20o1vofa365sv32720/30426631071.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160da10b402ae7---duvuka.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/68da8650d3e9d9b92c954a6e10fac7ef/10575601346.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_off0000e00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00A 10892 bytes
SHA-256: a70c307c493c20cde2b7b7a3925c9ddd127212c4beb0d74c51aeb902c7c65500
font_01_sfnt_off0000f8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F9 17472 bytes
SHA-256: 350226e21b59d08e3114e79ab7c5d7a44bd39836124cd6c41a6e7a4bdc9829bd
font_02_sfnt_off00012592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12592 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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