Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f070c390296dd2…

MALICIOUS

PDF

110.7 KB Created: 2021-07-03 22:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b367740cfc1e0c36c7bbcdd3d93d7368 SHA-1: d60678a9e2eba6ed3eb6aa336d38cee60256f996 SHA-256: 30f070c390296dd2d31c1b74217829db2df4b3e28d9fb0547c7c1f3eeef57613
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or use link farms. The PDF's structure and the presence of these links suggest it is designed to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9794

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/c9cb9eefc52652638bf85c2a0e42349c/82774874430.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607603240e24c---setulagumelupiju.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/oluq1a3tfr4v4omlnk4antriu2/78955969378.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/552a36000fad36dc9615f2d26170ed16/xekatibinidajenogema.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606efce9925a3---40558576424.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/fcq32pq4vevqae8rv25pucmqso/82702570045.pdf
    • http://yourtruck.be/upload/ckeditor/file/86012347467.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7bd538e1a6---vabakuxepasujexejimapukap.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093baf550916---28692544550.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/453d99aa8fefe346ec89557f73d36a16/kunowakixozobo.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e030b8dda8---telimag.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/cff33be7d3d4ba4815f942841a440cee/nisokudajopufet.pdf
    • http://shinex-auto.com/userfiles/file/titugujiruzizijubedunir.pdf
    • http://bartuceviri.com/userfiles/file/55921015428.pdf
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210623003632.pdf
    • http://vitaminyplus.eu/files/file/savasubulowupipuwus.pdf
    • https://berbagiangka.com/contents//files/munutujasutubepe.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f8a217afe---29352541761.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0ab4b78843cc2baf4c04a05df24b02c1/82727656426.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc34b7bba1---jepaxuvuri.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/4503e024dfdb8ede6f3b540fc7542472/17481094207.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/87sb5j9osiuhjjagll7d5lthen/lasegexeso.pdf
    • http://itineraire-consulting.com/ckfinder/userfiles/files/76127601502.pdf
    • https://watertorens.nl/userfiles/file/84740440672.pdf
    • https://hohsingfiber.com/ufiles/files/sijofibubonizonesowesanif.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f029e41c19---56674832029.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=managing+the+brief+for+better+design+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_off00014c70.bin
c712810c433ff4a56fa18c1748715a82899fe44ce994ab3e146caaba6524bb65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C70 17904 bytes
font_01_sfnt_off00017ab3.bin
458b3a31deb21a5e6ed85531178ed58b64360a3e3c07acd4264a7d27a4f79464		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17AB3 10864 bytes
font_02_sfnt_off0001934b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1934B 16792 bytes

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