Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bafee858428b96…

MALICIOUS

PDF

77.1 KB Created: 2021-09-06 04:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fd08d2ac9b8eaff4f793c1dbdaecbf39 SHA-1: 61c9dcc220bb86b61fbebfbd724a1efbee1dd942 SHA-256: 64bafee858428b966d141a9dbb84a24748b85d33367cd10c221aebfa8341ffd9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, indicating a malicious intent to redirect users to potentially harmful content. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or malware distribution lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/949df0ec929fc743dba237bca32b4194/nenuzog.pdf In PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/44107187215.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/76475652355.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/kejetav.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/danosiwijoket.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076695acac90---90418237592.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1c6047615---larefapusovopekunelomewi.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/6qjihbr4tn3omoles9eib5r452/veligotek.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/98b1e34a362dc13744f502e5c8ba0d21/1686802123.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd72455537b---poseditepamaj.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dc8b4d740---5146281494.pdfIn PDF document text
    • http://unsersohn.ch/images/file/9492074631.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/60d01aa0e92a87886306380418ba7584/pudopolidijozemate.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210505123036122.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c6429c938---pozewuwimedax.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/e437a3372c75cf57725ddfffc1cc4cc4/59081691017.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161343a30e830f---fawutuxumizexifalale.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/9tfog3md39trogrl6shkqe16or/xopipafaboraje.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/bupewewuvofem.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/25817339080.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/dobijelimirojusadubewuk.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad811e68e9---devozeluvejumuzumever.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/labiwosumikul.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/7lnoo15ub18rehcdr0gh1fv6k8/25149471488.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=batman+arkham+knight+game+guide+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_off0000c7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D3 10856 bytes
SHA-256: 7479da636eeb44246dff74114b376c32593bd64c4d8244861058762f0124c85e
font_01_sfnt_off0000e074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE074 17872 bytes
SHA-256: 7402c1ddcd16d070f791beb36eeece0e9a7bc6c128de3eda234de402d927676f
font_02_sfnt_off00010ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1