Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e1756160768e2d…

MALICIOUS

PDF

91.7 KB Created: 2021-06-27 13:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 077439680ca4679db203bd3dc61ee5cf SHA-1: 8d6fa5700d16cdec71b75e8ba15d35a34dc4c1c1 SHA-256: 85e1756160768e2de8a76d099c62ab0e51876c463aa7c2b1739dff7d30c1ae45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaddc6acc2a---xadanepimokoniram.pdf In PDF document text
    • https://biomedchita.ru/imeg_master/file/lomilabomokadidozedudugi.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/dc386eacaef3e7f81d23badcf6e7ca43/98804678269.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/9h4vs0f2qf8u1kn6c3hnkrvb7d/telegimo.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/85842625518.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/d4660a8b7e069eec56907e08bc29c51c/joxabobaxogudo.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc953358b7---wagotej.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/32385540151.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/03d79953dc0e971011e09f22ef1680db/setumetijelovejote.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/b27e24be6c0992d5a769facc6c4a813a/matevonukimirefasivazoj.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/tikotirumugusetiz.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/49714044213.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/40085f4f0c950818f6219980e36135ef/70130848442.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/44535848042.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/21056b9f3c5d44d6d4f5ee7ece297547/73142148045.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/28025841152.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/litipedosuxuvutoxam.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/supafepubojabakasozezigon.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/e2583b6f61fe336938d90170b44afc13/lituned.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/betofite.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/0f2ecec609003569a255093be8775e75/nakoribirenifivubon.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160740c7b028b7---pabewira.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9014a1738---69010772470.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1609af2ca51c11---sububit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=understanding+and+using+english+grammar+5th+answer+key+pdfPDF 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_off0001016a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016A 17220 bytes
SHA-256: cc093a4108fba62eef70f771312ff2ab1c8012d49e6d606698d7fa1801319725
font_01_sfnt_off00012e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14663 11360 bytes
SHA-256: a31f9fa9c33e288d76fade6e067cfcdb352cc605fe75bcf96b134c62f30abc1f

Open this report in the interactive analyzer, or submit your own file for analysis.