Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6864a182192a12…

MALICIOUS

PDF

78.1 KB Created: 2021-09-04 18:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 04ad42cfa156766ad88045950da486c4 SHA-1: 2288e419263c5696dc5b5e15447c9d27150369b2 SHA-256: 6d6864a182192a12b3c245e4f255182d5422683af94247de8ff6a8445aa50e26
196 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm or phishing lure. The 'SE_LOLBIN_RUN_COMMAND' heuristic indicates sequences that could be used to execute commands, further supporting a malicious intent. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or SEO manipulation campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7121

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2f32b3ba9---zatikimirusopowole.pdf In PDF document text
    • http://dursunguney.com/userfiles/files/furekekuludefomobowogubij.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/a901442a34c0d61c40f1a48eb4664de2/korababusigosavorafawo.pdfIn PDF document text
    • http://rockycheng.com/ckfinder/userfiles/files/lokipukekiwi.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/49125086421.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/nulipirinateruketileguw.pdfIn PDF document text
    • http://webmba.fr/client/logo/file/zetora.pdfIn PDF document text
    • http://canyonmeadows.org/userimages/fidovi.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/zulonovexamekizuj.pdfIn PDF document text
    • https://hirurgija.me//files/70135787908.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160caa4fe678ad---davodinimabezupib.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/fefogufojuteginaxagut.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/94260796148.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/tusefufizef.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/dafuve.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/zabes.pdfIn PDF document text
    • http://dietgame.net/admin/fckeditor/data/file/20210803060159.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210802_150611.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/76920071237.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/6v8fc04fern567lqbt59pcmdbv/nuwarovifetake.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/54226846962.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/dujonajowa.pdfIn macro / runtime command snippet
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/33183807709.pdfIn macro / runtime command snippet
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925b32d8aac---tarukijekeliwatafakej.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/fd35200f55140c6c55c37ef37338d2fa/tekinapepawinijexo.pdfIn PDF document text
    • http://dynamic1984.com/user_file/fiIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=whirlpool+built+in+dishwasher+manualPDF link annotation
    • 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_off0000d44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44A 10976 bytes
SHA-256: b7bbc7bbaf79f38f717a5aad01fd5385758ff5cec3f6330514a3e0fc4b9f0c8b
font_01_sfnt_off0000ed61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10573 18440 bytes
SHA-256: fdd51f4afc654064b2cac3a929673544029a902bacaca84eeb33ede655971b7b

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