Malicious PDF — malware analysis report

Static analysis result for SHA-256 5517ebdd24aa7614…

MALICIOUS

PDF

91.8 KB Created: 2021-06-27 04:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd3e9482179ff0f8f5291744686f935b SHA-1: 2c03e4b752ec9a1f92755b1f19e730a944bef7dc SHA-256: 5517ebdd24aa7614d50a32b4c7bafe78e73590dd2a46e0bffea3c4312e0ba347
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure points to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/6e8757a151623f82d482d851137cdff5/teratutamekinimi.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/caf0947835a19fa8490392f387080d4d/falofibeliginusasuluj.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6d4bd2ab8f6ff4049ff42c17f76ec705/56859293028.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a99aa06f5---demefowosifofa.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbcb9af2fb---16197773285.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/43124cee032144c2a5c7c4576089e7da/8210906777.pdf
    • https://htlexpress.com/ckfinder/userfiles/files/nejerexujozutawij.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/32c1348a43bf06c42fd241668364839e/88051685393.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57bf4f1f1c---kuvoj.pdf
    • http://asfalon.com/__files/file/davebalenewetileraxuwag.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/f25aaca20ba4e1e20ef1a04084b2e4f4/favupuzemudenobajewomava.pdf
    • http://cesishotel.lv/res/wysiwyg/file/16052276988.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b05b2f36362---dafuzulat.pdf
    • http://esejsc.com/upload/files/junalalusaf.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c30c457be2d---87246519825.pdf
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ffd69f8ed3b120f63c344918c045908f/dadexamaz.pdf
    • http://copy2d.com/ftp/image/file/kozisoriwatirevote.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a54129192a7---53261100114.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607460900b0d8---43241050980.pdf
    • http://www.klimavill.com//data/editorfile/97979294357.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078d17f56864---97866621500.pdf
    • http://voxel-avocats.fr/uploads/file/ritopobuvujemi.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb6a5258f7---kibafa.pdf
    • https://monocroma.it/wp-content/plugins/super-forms/uploads/php/files/27f1956d8f73da3f892565261663643a/72189897315.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/3f4599840bd1a526e443ed995865281d/kexiberokukofuku.pdf
    • http://maychamsocda.vn/images/userfiles/file/bujotidaxu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=displaced+metatarsal+fracture
    • 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_off000105ec.bin
b39456c9f8decd487243870931d6828d7e92973a0b6bbaae8b3249307d7d5374
pdf-font-stream PDF embedded font (sfnt) at offset 0x105EC 10660 bytes
font_01_sfnt_off00011e61.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E61 16792 bytes
font_02_sfnt_off00013673.bin
ca34097011207a4f4dfe33491ffb3dbfd25e5f32fe33e68b79bc1f762eda9ee2
pdf-font-stream PDF embedded font (sfnt) at offset 0x13673 16708 bytes