Malicious PDF — malware analysis report

Static analysis result for SHA-256 70066c0cc531bd5f…

MALICIOUS

PDF

149.6 KB Created: 2021-05-06 20:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97385eb273eafa55c18dd5e1e5b518ce SHA-1: d35d02f74153b84e87f77a87ac77402b9c00dcad SHA-256: 70066c0cc531bd5f20654e895313d6c23571f9f04bd150ff8dd7aa9a8de96872
164 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of external URI findings and link farm heuristics supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nomylo.ru/uplcv?utm_term=bahubali+1+tamil+padam+full+movies
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607adba0a5e46---42058579955.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/b756dce2f1e2d5367804c74562aaff60/xajatunixutakosimipumuli.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/osdg803eheps3gfd3hon97k4k2/logugumeviwago.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/9bb79fe5a4e1feab4b3476eae10dfa0d/dikerek.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/5e2ad47942fc9b08f1c18758cf8e35ca/89753914972.pdf
    • http://alnadaoil.com/userfiles/file/regavomewugagovuxa.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/528fae0fe3ed6e2545c7e4f177f1fc87/70572262781.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/990d1271e85f223fd331ec6d7e68e757/wetaradera.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc015d50a1---24831729744.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/24d116b06dbcdf9bc7354db2501ddec4/36931986223.pdf
    • https://ajitcoatings.com/uploads/jerirofemodaxiwufawapa.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606d934ccbc45---banibavukiwapusenan.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/7924i09icv7vm6fis541ahtb5m/77423955535.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/eca6eecb089d9c6c52b1480a51a57f84/89991356414.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1f7c39014---82427562784.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cc40.bin
c0678eedebbef899dfa67a0869e40226f8a405a6708469895df839c35c45d367
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC40 13584 bytes
font_01_sfnt_off0001f8d2.bin
3670693543387a38b4b3354b04700a3e3a094442397dcab6614a1448b8a6d293
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8D2 5484 bytes
font_02_sfnt_off00020b63.bin
7585aa5f1df1f34a263c41819a91d733a813b721bfc63114809c054c15b36786
pdf-font-stream PDF embedded font (sfnt) at offset 0x20B63 12340 bytes
font_03_sfnt_off000235aa.bin
8c109dc3673b86b6ec0fed68d3428b5f48affa2647f35dfd406a7cf403585126
pdf-font-stream PDF embedded font (sfnt) at offset 0x235AA 16276 bytes