Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74c37f2cb14e7d9…

MALICIOUS

PDF

85.4 KB Created: 2021-06-27 13:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90a13a6fb61d27d18892cf4c35cd5807 SHA-1: e075aaa2caa99e937cd9abf44546183ab68b1893 SHA-256: e74c37f2cb14e7d9ee0b3637f24f69a70170f2cc7cbfc625c4019ffb5200fef2
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's designed to redirect users to malicious content. The presence of numerous links on disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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
  • 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://securityguardsupply.org/php/uploads/file/50283843779.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075e8e6d711c---bubewatelul.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/041e2a3f7e02176114d3f05b1322a1df/85971312489.pdf
    • https://tahubunting1.com/contents//files/3488551636.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/5563afcbc655373421babfd4a9a2141a/bizedubovupipuxubiwi.pdf
    • http://www.ecostroyservis.ru/File/51929777953.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/feda370a261a01af047d02999380e9e4/4988435107.pdf
    • https://ka-base.no/images_students/files/genozekupedudakusebenol.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/f080ae7ed8dd4eeb2df078a85de95443/17957040103.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/qhv2aat1ocrsfno55ah8epa4c5/7930280799.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16092b1aeb69cc---5475247628.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/b3a5a341141d0b0d8736f54484b62518/nuxasonak.pdf
    • https://universal4shipping.net/userfiles/file/95320912260.pdf
    • http://yfatc.com/userfiles/file/mopilemedokipibufagufen.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a460a5ccdd---sizubabelawafusimipezofeb.pdf
    • https://foundryindia.org/userfiles/file/vemun.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/29c0c01e464d4990ee8f2587a0e15f09/52766991494.pdf
    • https://accuratesearch.com/userfiles/file/fomezi.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16089a6371a93a---zegaji.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/3u132q6tepff7fnpdf2av9aipb/goludasiwixiv.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/39f9befbca335b42883ef42065d8c9ea/topoxiravonudavoxod.pdf
    • https://laetitiabernard.fr/images/file/puburunivuxapuledal.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/sc3kk1c04erhls6ev08og3misu/muzujodiravefoxowuxugomi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=psalm+147+commentary
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607618ece291a---famikupumato.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_off0000ecfc.bin
d9435ba6820a52f293279f08ac0e7e1694c5db33680e23e99437e1cfdaf1771e
pdf-font-stream PDF embedded font (sfnt) at offset 0xECFC 10592 bytes
font_01_sfnt_off00010565.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10565 16792 bytes
font_02_sfnt_off00011d77.bin
abf1260a3caf1614e222cd88deaa5cf8ac1cf3ea992c9f27e227aebcd224deee
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D77 16760 bytes