Malicious PDF — malware analysis report

Static analysis result for SHA-256 60463328b58224c6…

MALICIOUS

PDF

85.5 KB Created: 2021-07-02 09:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5f9a9debfce4d9ed46409fe505c690a SHA-1: 7ad3277f34d9c7a21e7fe0f645734dcf739ed751 SHA-256: 60463328b58224c60c02004ee9dbb287a7705084e11170956f768ba7be401426
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, with several URLs hosted on what appear to be compromised CMS uploads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://emrc.ie/upload/imagecontent/file/wasufumajozesipeduse.pdf
    • http://glamour-nsk.ru/ckfinder/userfiles/files/43464636792.pdf
    • http://thuephotocopytaihanoi.com/upload/files/turiwozivosiw.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/51127bdd301fb91701bc3adfbb476f99/38255523597.pdf
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/vogoxunogobux.pdf
    • https://tycoonmarine.com/userfiles/files/21355230979.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/vff0fblgbahfihkngg3ue3ktqq/jopotegejajunir.pdf
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/bc8642923e3f7ad24368988776fdf6ca/kudofenim.pdf
    • http://grandinhr.eu/images/user/file/vinabubewoxome.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984c5b861ed---64854613998.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/e9cff58ef296447c30796ff27d4899f0/45563769159.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160908dd2921c3---fokenasanudufinedawuwu.pdf
    • http://jeansresource.com/js/ckfinder/userfiles/files/17321018606.pdf
    • https://tcremich.lu/files/files/77695272647.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7g2e84g54iasu73o5n8b9vlk40/rokawivoleke.pdf
    • http://hersheyhigh1981.com/clients/37302/File/popoxivorenov.pdf
    • http://stepsforstarlight.ca/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/42806387105.pdf
    • http://iwishop.hu/file/23116315413.pdf
    • http://vasvaripalmuzeum.hu/upload/file/41713285006.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/41516bad2714c8f7eecc4ba2380f69cd/numuminefimininir.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8e3c3da02---42321647005.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160770100cc601---wawetosaxumete.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ab8a4fd60---nurowalujokijen.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=all+black+tattoo+cover+up
    • 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_off0000eaa2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA2 16792 bytes
font_01_sfnt_off000102b4.bin
a745c5d782b52479cbe9fa092055590cf190b18e0b6e899430c3c6062e44abed
pdf-font-stream PDF embedded font (sfnt) at offset 0x102B4 18292 bytes
font_02_sfnt_off00013189.bin
28bf65bfcc89ea9914fac7c5e44dcdc0b4c074e5de5727b7c51661c3ffdd1885
pdf-font-stream PDF embedded font (sfnt) at offset 0x13189 10380 bytes