Malicious PDF — malware analysis report

Static analysis result for SHA-256 69997d561187a36a…

MALICIOUS

PDF

73.1 KB Created: 2021-09-15 23:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bd194ea87a93736086de9fe80aa2d61e SHA-1: 2a303e9a44b52df10f6576fe1d4234dd4d635837 SHA-256: 69997d561187a36a7310bf9b1af013b3f596cb416999dcc6645a1e621d9bd0bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to external sites, several of which are hosted on compromised CMS platforms. The presence of multiple links on disposable hosting and the use of UTM parameters suggest an attempt to obscure the final destination and potentially lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://tourgardan.com/basefile/tourgardancom/files/mafedixogukovosipozo.pdf In PDF document text
    • http://ombs.ru/uploads/files/71480560679.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/39166115169.pdfIn PDF document text
    • http://royalwedding.jp/images/blog/file/dituxebafemuvorozo.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140972580cca---pejenojuniluwivedokuzar.pdfIn PDF document text
    • http://konberdbio.com/upload/files/vigemosewevaxut.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/7253248476.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/guwuvijogonemukode.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5pkrgoj30snrh6cncum2fejfc7/79206407514.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/wajom.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/wituken.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/94421499322.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338334b62d3---3608122791.pdfIn PDF document text
    • http://bouwbedrijfbouwheer.nl/userfiles/file/tofuxasozixarabowe.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/poia00uhl0m558cf2ln5gksjs7/9756304234.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388dead5b6d---99982835090.pdfIn PDF document text
    • http://gensugroup.com/upload/files/datepago.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/dijasuwiwubojerole.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/paradi.pdfIn PDF document text
    • https://vicareyou.com/userfiles/file/46627675699.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/75872927804.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/vekoxa.pdfIn PDF document text
    • http://gazduire-domeniu.com/UserFiles/file/wukakal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+apa+cite+photosPDF 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_off0000ba24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA24 17528 bytes
SHA-256: 15c093965d2f4156b324895ec20f9f57036ebbc16d5fbfb4cf3eaeb7b67b0d8f
font_01_sfnt_off0000e73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73F 10296 bytes
SHA-256: 6cf630d2a6581063e1a6fc3af6b0ae7d91350690cfe7c6a63d0396e951a2267c
font_02_sfnt_off0000feac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1