Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7c447c947f90b7…

MALICIOUS

PDF

88.8 KB Created: 2021-07-18 23:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 59c34a8ce16463c2ef2acfc357480d92 SHA-1: 982bc59d43d59403035bd41259806d297fda2015 SHA-256: 7b7c447c947f90b78e58ec48ff866c167745606493c9354d338b98f023ffa7a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The document contains a link farm with numerous URLs, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to distribute malicious content or phish users. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious lure, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7687

Heuristics 5

  • 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
  • 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://akinmedikal.com/uploads/file/10366836843.pdf In PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160701c248b039---74308188607.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/43231893933.pdfIn PDF document text
    • https://digireg.se/upload/tupowumuputifim.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/86410311260.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/fatagarusaveguwaxerevot.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/figisisamogam.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/d2461124fd1b3f2719d4955cf654d886/91811456818.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/35189203668.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/297acmrv46rjdgoo52qpgfc7r1/zebewoxenevudusuxo.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/remaratemawiwekivona.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/3781821958.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/81724981608.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/gofifu.pdfIn PDF document text
    • http://marty-triple-m.ch/inhalt/files/perikiwawivedogipe.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/939bb03bcf251f6741b796cfe43673fc/zofot.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/a1vgrv41a02s30kjob0uoai0qu/21171888992.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/7ff15166e6a558bd9bac3e4c298ccbbb/gosetulopi.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/7961915783.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e9144c0773d---3347419124.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/l74ec2c3ufg34g0ptfmuq36hdr/widibig.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be008094763---dazolijedadovevufewu.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1434bd2ba---49256831916.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/nonepoxedojulozujenenefos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=same+as+definitionPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001010e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010E 10444 bytes
SHA-256: efc06f0bcf263abecd3d7eb0a8f3512ee9abcfbe5e4101779f077bef70bdd92d
font_02_sfnt_off000118ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AB 1824 bytes
SHA-256: 553a3a3ff2171ee725f074c79681eee5d1607095a53253520ffe34f8f3162789
font_03_sfnt_off0001211d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211D 19692 bytes
SHA-256: df4fb57439c6b5bc2eed46ad9a0efca1569930290aa07c4f3142ff57b47ef641