Malicious PDF — malware analysis report

Static analysis result for SHA-256 67dc2e529aa10d3d…

MALICIOUS

PDF

82.9 KB Created: 2021-09-15 18:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 872411a737cde88df466411317cb6043 SHA-1: 1d92cc79ea915d499d78e055996b6cb01ab65fe5 SHA-256: 67dc2e529aa10d3d52bbe4851f726a2fd1bdfd6331e8af66117259c01f1af9b8
196 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 compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The heuristic 'SE_LOLBIN_RUN_COMMAND' also indicates the presence of command-like sequences within the document text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://cructi.ru/uplcv?utm_term=restore+my+phone+app PDF link annotation
    • https://sitpchemcieszyn.pl/_sitpchem/file/51353108113.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/52992160830.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/pomewetogijafaw.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135af8f48f1c---lodunorumepamirenumebesi.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/gexojufavonibew.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/lelokazurokelepinafowat.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/48398741860.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/wotimurogu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137bcbd2a980---70637261588.pdfIn PDF document text
    • http://zygzak.eu/foto_dane/wysiwyg/File/67578275203.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/suxutivemojoruxekem.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/xumuwam.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136894eade57---rukazotijugosakasesaf.pdfIn PDF document text
    • http://hainfelderteich.at/saseguzo.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/bewogaguxoxomolanizov.pdfIn PDF document text
    • https://urology-andrology.com/userfiles/file/jeviw.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/zaworemamoxeze.pdfIn PDF document text
    • https://semangkabiji.com/contents/files/xetado.pdfIn PDF document text
    • http://centromp.it/userfiles/files/xeponaxabogo.pdfIn PDF document text
    • http://webbuilders.com/files/file/33385272358.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/jolekusexoripozenijile.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614181229d621---luvakewivubipugapuwedal.pdfIn PDF document text
    • http://speckrepej.com/upload/file/loxarawog.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210912_33CAB6D0E7BDD355.pdfIn PDF document text
    • 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_off0000dec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D5 18388 bytes
SHA-256: 846c598f6acc6f13f909a164e25e552bea8e03af8528349cd2fa864839e82ba4
font_02_sfnt_off000126b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B6 10540 bytes
SHA-256: 4a1fbbf0365d44a9afc00f5a11a928f16443931c815acf3e49f6c23bc2008995

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