Malicious PDF — malware analysis report

Static analysis result for SHA-256 30449a8e1de9e4a2…

MALICIOUS

PDF

78.1 KB Created: 2021-08-19 10:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d696ff50fc20db4dce498b9ce6e98af SHA-1: 116fcac9523ee57a35ba9fbfb3e544b2163b4ba5 SHA-256: 30449a8e1de9e4a2e857e24d05a7b3b58f8da21e6dcbc1c08afef6dbce18c4b0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic strongly suggests this intent. While no scripts were directly extracted, the presence of PDF link farms and the ClamAV detection indicate malicious activity, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607714879f59c---39108988481.pdf
    • http://mcelvain2020reunion.com/clients/b/b5/b5167212b805812c9439186484f80f5e/File/lelepipagorek.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/64cf0bc8f01f3e3224123d454098474f/fidogetijimabaxidoti.pdf
    • http://garderoba.sk/images/_file/34202814577.pdf
    • http://komputerzagrosze.pl/userfiles/file/33151207564.pdf
    • https://aduanaldelvalle.com/userfiles/file/81891183532.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/56a3329e6d68d2b60b132c6f39e10edb/namekagadanesuja.pdf
    • https://ksuskalology.com/images/file/fabibirojunubof.pdf
    • http://uniradioweb.info/userfiles/files/22454600241.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c316f1a043a---82506984650.pdf
    • http://primaneighbors.com/userimages/jezopabax.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f31d2c8ac38---83531415387.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a79fe2f0870---pafilel.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/b3c3088470cdffce7a2f5e3e85c931af/36262519452.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c68fb0366a---zopiwabunarumivokav.pdf
    • https://ktmcollege.org/public_html/userfiles/file/37772584899.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/fv563anq90ubpm7kbucmvb7knr/vitamojit.pdf
    • http://jrpst.pl/userfiles/file/69936998760.pdf
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/23908859197.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c21d4ac80cb---pivokuraropelivunubif.pdf
    • https://airbays.com/userfiles/file/libujuz.pdf
    • http://whatdwellswithin.com/file/23254479772.pdf
    • http://zpb-maciejewski.pl/upload/fck/file/komakiviliguzogefetepe.pdf
    • https://arerp.kr/data/file///23766015017.pdf
    • https://mimpiindah2.com/contents//files/tunadena.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=manual+de+exorcismo+pdf
    • 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_off0000cbf1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF1 16792 bytes
font_01_sfnt_off0000e403.bin
8b5163f2071a41c1f623a00b2386a6001542e550d6f84dc1113576c09be07b0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE403 17156 bytes
font_02_sfnt_off00010f78.bin
ba961a47db32495955685da5eb02be36dfb5570d37406d2ce02e94d292204400
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F78 10880 bytes