Malicious PDF — malware analysis report

Static analysis result for SHA-256 a400e06030ed79d9…

MALICIOUS

PDF

90.9 KB Created: 2021-08-15 08:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eb353e9e59cc110395ca65c99b951c66 SHA-1: 2da7ff19a949fc5bce347fb271d1249f53903706 SHA-256: a400e06030ed79d94b898e43b54469354785447724095bd7db411e9a4a601da4
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to domains flagged as compromised CMS uploads or disposable hosting, indicating a link farm designed to manipulate search engine results or lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://allprintusa.com/admin/images/file/94766876106.pdf In PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/movibekowanipijisaze.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/64c436dd66519f57e82c505e768ce3ec/jabuvukoxetev.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/suvejavakol.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/9998957366.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/12470098883.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/e3954bcaf3d3a5741e361d5949463e0e/76215286094.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/degalumubesafepinaz.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/newowomefu.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/sewosezatanixam.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c62e86acb21---5042953127.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/vulutegod.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/fewogovajexelapegilol.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/fph5jcsds1s4n1tmnui4o7cps7/sexujagikegevixamuz.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/fefexe.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/mifefabovedu.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608027a5d0f0f---sesajo.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/tabafiwejuvefuxijojalij.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/vezuvowixozosovudamiviji.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5b723705e---rukajidadip.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099cbb3683df---27287528730.pdfIn PDF document text
    • http://summithigh75.com/clients/867147/File/77499925342.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/hhk1jlcq18jip7vs0bkdrep701/52397565627.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/52137268042.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bca1ccaaa08---kewavimawuvafoso.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/88469989470.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=trigonometric+ratios+word+problems+worksheet+with+answers+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_off0000fc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC65 17204 bytes
SHA-256: fdc5c6c14e96f2490018dfd56a7a291f0b1fca39a96177b433c44783335e7ca9
font_01_sfnt_off000129ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129AD 11348 bytes
SHA-256: 84077dd53e6532ed7f374d69b77167b719920c824b71f5fa998d5d032f19018c
font_02_sfnt_off000143d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1