Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7fd5d15b7c36a1…

MALICIOUS

PDF

87.6 KB Created: 2021-07-19 00:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5e663fe77b99d378b3e8ba091d948b3 SHA-1: d01505d99ed9f8749401c1ed86e7143293dd60a5 SHA-256: 7c7fd5d15b7c36a12b164e438cbdae749a753ea01c32941ae270ab6213ab61c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to drive traffic or distribute further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/d91c37616d92a501ca71de2201bbe648/56171463266.pdf
    • http://mobydick-band.de/fckdata/file/bupejuger.pdf
    • https://morganmethod.com/ci/userfiles/files/57212377576.pdf
    • https://ljlconst.com/admin/images/file/48677565522.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/a102022e83324cc7b72682da2f78b626/14106778590.pdf
    • http://omgmediatank.com/userfiles/files/12183970145.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16074761e0aabc---dunidonuri.pdf
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/xitenefex.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/vjeb8di6evtq3660jiruasncm4/66046671806.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/4glkbe7cnu0it6coe7hsl79si7/sadazotunulizuwage.pdf
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c774dbfa93---ramojejuwukax.pdf
    • https://sukhayurveda.in/userfiles/file/bepirodugaxuwu.pdf
    • http://veterky.ru/ckfinder/userfiles/files/18349899301.pdf
    • https://mides.vn/images/ckeditor/files/nedovagosilasenefeloju.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/9dcacfa82afddf15722a7114f821da43/kadevosezixanigujiw.pdf
    • https://mirrorlink.com/public/files/files/taxovu.pdf
    • http://sevimticaret.net/userfiles/file/63272703604.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160b476169bdba---85352389577.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a31f1b258c1---kulovukabalowa.pdf
    • https://mylodge-naoshima.com/buwelatuvilajapumak.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160dba2d7afc57---biruxikoxitufu.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/a29a64bf1e628192b8c4bcc809692708/pitiragofajoluvukala.pdf
    • http://2478.ru/admin/ckfinder/userfiles/files/94142707172.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160adaf00e3e2e---72227276011.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/902e002b6969076159f612e99d6cf6a2/81381545331.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7331d9226c---80634521420.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=m3+to+cft
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7a9.bin
b12502da83722c343ff7884b0689c4a6204fc04b4b1aab34ef140b11720ee444
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A9 9692 bytes
font_01_sfnt_off00010ce8.bin
d7473a0c502b8aee94373125f266e10a5fbe6eb49832475fa24fe46a1ac3a12e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE8 16960 bytes
font_02_sfnt_off00013949.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13949 16792 bytes