Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2f1eee133a5f27…

MALICIOUS

PDF

86.9 KB Created: 2021-09-05 17:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 58d363423bbc4de53753bb67cb977a3d SHA-1: 3a7b0157bfdcd89983d1bbc0d795f032e70ae235 SHA-256: 7e2f1eee133a5f275158bc3db9ff3f0546c0682dffb5927b42c3b52c85a05fb0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript and a link farm. The link farm points to multiple distinct hosts, many of which are compromised WordPress sites, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The embedded JavaScript is likely used to facilitate the malicious activity, such as downloading further payloads or exploiting browser vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://azbuka-d.ru/ckfinder/userfiles/files/47311228493.pdf In PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3950d6750a---wudexivegisesi.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/30613832479.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/gototamo.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612780f5d8aff---4424720481.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/darotatudopitoxusawasezen.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/2eo6clkm0t3nta1mii2hcoeonb/zadepelavozevolanuno.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/622aae0de7b728fcc3aa9c40fd84860e/rilogekavukujisuvi.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/462047fd61f3611af93a1ce65b5c9e0c/67470957356.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/38333939652.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/vo8oe3oh04meoad6bs69tpp6mh/15243347222.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160882ca717b8c---kazitoroxalamawusekuwat.pdfIn PDF document text
    • http://kokocurry.gm/userfiles/file/japabetavug.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a7583183f3e---ruxip.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/419vcfg0ltet57p0c7fstmq74j/8219583171.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/24074617531.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/8b5840b79d355851b56dceb8badf6e6f/godexepikemij.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5cc506f44---jokejetolupok.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/49380000969.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160834891b75d6---wurosomasipuporevowako.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/12580ad56a020c90a4df75d1aff8551e/berodupi.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/74569877211.pdfIn PDF document text
    • http://labmansour.com/app/webroot/js/ckfinder/userfiles/files/27708121435.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160fb2e0a42973---53381704998.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/4edf36906d12ee49d9ab6bc670b9130f/73188380439.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c4cc758d9d---88049970453.pdfIn PDF document text
    • http://sabaispa.net/userfiles/file/64574932839.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=pentax+645n+manual+focusPDF 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_off0000ec93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 18524 bytes
SHA-256: 5c390ffb113523cf93c277f3fa6ef1b8223c3ed078fc0a858d02b61930ebb223
font_01_sfnt_off00011d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D01 10888 bytes
SHA-256: 11eaa6a340ccd3d7500aec90ae61d2f751c7c9a75cf658762165050352edc3f6
font_02_sfnt_off00013660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13660 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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