Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5eab27d72d4a94a…

MALICIOUS

PDF

89.6 KB Created: 2021-09-06 08:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 424e74686c306d20f43d37f673393688 SHA-1: 39dd7498ab22a3296424bfdeeb3394b21f0b7f52 SHA-256: a5eab27d72d4a94a92cf93d998e644079350bd95cbf8e76fa36154b4a45353d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to potentially compromised or disposable hosting services. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest this document is designed to lure users to external sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/73icrgfr5lv786v2rel3rguuc7/gagobukozekoxized.pdf In PDF document text
    • http://seoulsquare.com/userfiles/file/tukosotenukabenorosawafu.pdfIn PDF document text
    • http://peaktoppet.com/ck_imgs/files/69454717847.pdfIn PDF document text
    • https://cuatudongsaigon.vn/uploads/files/zujagitulubexisafumirogez.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/okbicsc2qbsvlnv79p8sd334sd/89873938461.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606da4ae39ef4---73285066969.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16073989c1ca2d---vamomur.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/02379195e2fb390dd3f233701f302296/36588922185.pdfIn PDF document text
    • http://mrmax.ca/clients/9797/File/reloworekubogemelijamamub.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/62607431308.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/donasonaxuvujadowod.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/s22f3j80qhkdld4308e8prfoh2/wofuwixepolaw.pdfIn PDF document text
    • https://dineflon.com//files/xirumomazo.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/sumiwesibojusorug.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/oiajuemuun0ip1t7bmed4801n5/97291171667.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/91849138461.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe57e1e42ef---41820441014.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/38849848591.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/md5tdmk8thtgsbj134jl4g8461/zufalowenux.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/zejozunoximegu.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16102f87c9cbb0---wiregesugotatawijib.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/gurapesebituwot.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/oislsvpkpaplkvbgcair2m9i83/50545827290.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=1989+suzuki+swift+gti+shop+manual.pdfPDF 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_off0000eb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0A 11448 bytes
SHA-256: 6792e0ff1bdf18bf72aea2b7417c0740d099b66afe03665192c610985f81757a
font_01_sfnt_off000105e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF8 22068 bytes
SHA-256: 97337225c5c0899f5d8c4698ac5a506081f95f3c77585c51773c64afc87b0a99

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