Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa6f394441be38f…

MALICIOUS

PDF

96.1 KB Created: 2021-09-05 20:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3998ff7827fb12ac5d074dd64a25deaa SHA-1: d0f08f911b308ba17d0474c7bca0b506688f6d2b SHA-256: daa6f394441be38fa69cb71ad9128ff1b32641f8b6796e589e8232015c7bce91
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to compromised WordPress sites, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=manual+casual+labour+meaning+in+marathi PDF link annotation
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/b3643390bb076dd28847fa5e5a74661c/xaxilafisukagamadeguxa.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161149f8abcd50---84659002600.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/80317363515.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a26a4b56825---96251076916.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/wunejinumuguxabino.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/f83rpj1eo32m1h1390f2c2jd93/3587286851.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/dalozuragerovitudojidila.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/50253639010.pdfIn PDF document text
    • https://advertisementnepal.com/ckfinder/userfiles/files/joniliju.pdfIn PDF document text
    • https://termoformat.md/img/files/wenuronakina.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dhi8erk8gstqf0ha7ufckvr803/mavabajisumogetazekijaz.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/1d5ebd5cdef31585eb0346c51c843b3d/57911057712.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/49305556714.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/xojagoforolinoretojutisu.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c916fad816---zawalajoduxegekabalagul.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/nujujetigakegidinite.pdfIn PDF document text
    • http://zjbfjt.com/upload/files/70871662975.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/wejekisoxebot.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d0e2cca31---gewezokubekefaxawabofi.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccf1eb02e9---mejibedulipaminademewodom.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/5f56f6cb8ab3f9dd812aa4ddc5ea8574/jodijin.pdfIn PDF document text
    • http://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/kafizojepudefi.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/46b75f54eb8b54f7e83f1e3ad32d2b85/kaburajubegovoraj.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/tasodalirorulinimas.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d345322f6---59270776025.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/xetiwomerika.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_off00010519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10519 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2B 22900 bytes
SHA-256: c08c37c8f7af037f358554f39bca4980eba9f9f89c6e675015058ad373a99b81
font_02_sfnt_off00015983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15983 10912 bytes
SHA-256: 8f2e23f4218b738c359d0b841482d3d5df933fc513da16a4412a167bfc2404dc