Malicious PDF — malware analysis report

Static analysis result for SHA-256 741a672c0b46d4c0…

MALICIOUS

PDF

92.3 KB Created: 2021-07-03 22:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 033707be59328f8ab81290526058f1bd SHA-1: 6f6d274a0593bcf98699e973e751dc1bcdfb0ac5 SHA-256: 741a672c0b46d4c0dee171a559b53d55dbbcd7d0906a5ca0b9853cbe3af44175
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' lure further supports the phishing or scam pretext. No scripts were extracted, but the overall structure and URL patterns are indicative of a downloader or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=coreldraw+2018+free+download+full+version+with+crack+32+bit
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/7bmuvoitd32n3o5lmip2ir4d5j/motowofune.pdf
    • https://ozmutludokum.com/userfiles/file/dupipejabopesifanamubama.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/ad025246d25a167f68c6305a0d0a0c2b/81492455546.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/f186ee4f7d471b6d60f50cc70793196d/jugijujilaziloxoxo.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/6880d8f350ead70b56b14b0707a1590d/76240645389.pdf
    • https://101doctor.com/uploads/ckfiles/files/60b0573ed7eb4.pdf
    • https://atphp.ch/userfiles/file/48614195183.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b9734b90d---83251930413.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8229bcb3e---21597843595.pdf
    • http://bawaconstructions.com/editorData/file/9888790941.pdf
    • http://cathyknightwaite.com/ckfinder/userfiles/files/verekavosuderawobebajep.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/l75iqia23ie9ihq7cje6jbrfcn/31746455850.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609cba2294184---tisomirapegezabat.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/e2kk25r8nco9gv54c6tstmboq6/nebepemumitazixedonuxexix.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/7f6f9dfc138da982b06667537575af76/pozizitibepifol.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16088089c25296---83543049558.pdf
    • http://boekenwinkelindex.nl/images/uploads/vejofemururaxuponugux.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba76420ca6---paxelonobireneziwut.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890a2dcb692---lubup.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160908bf26dcb6---nirepexuzivisik.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/r1ur04qiigcgdm0mes0gktl3q2/befaridizepiwuvazapikud.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/a6rgrpfug87aocks1d0o2j865k/wejajefaxogipa.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/3491340894f322edf5c96a7758f0d8eb/21914191525.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d788b409ea3---wemiv.pdf
    • http://ndt-tl.ru/upload/file/gitipaganako.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_off0000f09f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF09F 16792 bytes
font_01_sfnt_off000108b6.bin
794ef4778c8b5832e6e386b433956c246ff8018e068e2c299c3a94708f31bc20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108B6 11764 bytes
font_02_sfnt_off000124f9.bin
310ef85a2b1e4a65042b07b17f2be3f0433c98106734d5b8fc4d08f09ba61b0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124F9 32168 bytes

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