Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e23a9ff34f77ce…

MALICIOUS

PDF

85.3 KB Created: 2021-07-01 17:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba79bbb13d860189a2ee2786adf8090b SHA-1: 51438161f4d8043908dbf6bbb946e7edc1a1209b SHA-256: 34e23a9ff34f77ce40d77c69dd0a04beac360864469fa7d3e61ab7f6e8083331
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d0241c8030b---3392745985.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afcc078febd---jopubuvejomibafemav.pdf
    • http://keramann.ru/uploads/files/48803358996.pdf
    • http://all-pass.com/folder/editor/file/taxuzofafum.pdf
    • http://technology-mp.it/userfiles/files/6473011323.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/0e3efa251df67389a83b609b7e8721d5/91164068893.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdab7cbaaa---sogezunaziruvopi.pdf
    • http://maxtarget.by/ckfinder/userfiles/files/gelijobi.pdf
    • https://maintogelonline.info/contents//files/67739671101.pdf
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/wobujizanejosekejez.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/39d79bcf26c4921352af112a5655bf76/bawofozadumisuzilugus.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e54db0da36---78300051776.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/dc5609c588a703f7511dbd9bd9657122/79318185885.pdf
    • https://adasms.fr/userfiles/file/tebaliwawi.pdf
    • http://polyalpan.hu/_user/file/zigowa.pdf
    • https://menu2uplus.com/images/file/kadipofuvizala.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6cad0b9bf---23399767469.pdf
    • http://tvoirostov.ru/ckfinder/userfiles/files/vifuseta.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b770e3a92c0---96823512270.pdf
    • http://all-pass.com/folder/editor/file/xakewudemosoz.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609538d9b8d73---87873866263.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b300a593b2---77977338216.pdf
    • http://aaaexpressac.com/userfiles/file/zapitoroboronoz.pdf
    • http://acecaalcoy.com/userfiles/file/77803041081.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+have+female+baby+sims+4
    • 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_off0000e9f8.bin
d6157731d249e04c9dc2ecf709ce5e45137116339f95711fe67bb605bd764c52
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F8 10752 bytes
font_01_sfnt_off000102c9.bin
484c208019e62c4c3f902c1c7430daeb0007faa0231901719d58eb9d6929a41b
pdf-font-stream PDF embedded font (sfnt) at offset 0x102C9 17260 bytes
font_02_sfnt_off00012fef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEF 16792 bytes