Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c6370a199c18ef…

MALICIOUS

PDF

78.4 KB Created: 2021-08-30 22:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 602d72fad16a79c7b33facb747a20576 SHA-1: 5c5925a60b4573de377007f8dc2a1f2fea498de9 SHA-256: 95c6370a199c18efd90e52f90515ae3b0876e62d1cfdad6a2e9a86c2515f2698
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external URLs, several of which point to compromised CMS upload directories. The presence of urgency language suggests a lure to entice users to click these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9844

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://sitycare.com/FCK-UserFiles/files/80254903478.pdf In PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b96d2722a18---bekopi.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/39572734129.pdfIn PDF document text
    • https://digireg.ru/upload/26719601291.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d2de98e76---jojajaganugumixujobawulop.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210606_134202.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a837380e88---dafapogojufolomizitoruros.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/63thghs5cikb9n5f02c7mhn9kt/jasemubebog.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/7004f0122b5f7f323222067841760de5/barelaxe.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ea1484e84---nijebonusuvupokuvugo.pdfIn PDF document text
    • http://candientushinko.com/images/file/68621446794.pdfIn PDF document text
    • http://allycatering.com/userfiles/wiroje.pdfIn PDF document text
    • https://czus-lukasa.sk/userfiles/file/zazil.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777f212ba2f---12891201883.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/89603534762.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/44572798320.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/ramijudonojoxob.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad848c40643---bixenazofelozimoxax.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/d4253b9d5131bd678735a5471490c3fc/13698118279.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/61164523861.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/napunob.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/vepujuwugijonepizuzo.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/fdd4587e921f3f10234f540a866a2676/54971900621.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/somajuwoputimafeji.pdfIn PDF document text
    • https://uzunlarpeynir.com/dursun/upload/files/panelubajadozufefolob.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/n14n5q0hujtv7lp7t55aq9jfr2/wamos.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/79049767360.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=mother%27s+day+quiz+questions+answersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEE 17368 bytes
SHA-256: 9ef4ae082d54fa782160fb821424759ee58105edca56bfa6cfb304f1f2e9a6aa
font_01_sfnt_off0000fb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 10832 bytes
SHA-256: e7dfa58c96086a100943d467fe7d3c4a0962f1c3cebfdfa26212a14528d990d6
font_02_sfnt_off000113fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1