Malicious PDF — malware analysis report

Static analysis result for SHA-256 906c907e132a5d5d…

MALICIOUS

PDF

81.7 KB Created: 2021-08-24 15:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e7e34d6e7b8e5f142bdcff4bd2de644a SHA-1: f8920204d4ed83986859778b64d7adbc722e71d6 SHA-256: 906c907e132a5d5d0a7690f55d867e383fb861ce9983071e71f26959b3d9e198
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.2133

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
  • 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://garglob.ru/uplcv?utm_term=free+video+editing+software+for+laptop PDF link annotation
    • http://www.tramag.pl/upload/file/vovimuvagajoger.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4b0a9a0e4---nojag.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/87551620368.pdfIn PDF document text
    • http://oklogistic.lv/upload/file/25292924233.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae67690442---66389121694.pdfIn PDF document text
    • http://accronline.com/userfiles/file/21327552875.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/liwemiposimeluvelo.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/taxata.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/21480632438.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210726/210726031447883108m5szcgz17tm1.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/2424884410.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be43af3dad5---54861462312.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-5-15/20210515141546474831.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2702049b7d---daluxitimisudebegivuzulo.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba8b62bf51---84477361728.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/f9rn4cajmbuf919413ispibfo2/21625617875.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/xixuzajipivakoxezifel.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/jujemavubogodot.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608530eca11b6---malazuvumexun.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/53175317130.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/wavalozimatiwal.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/33770221026.pdfIn PDF document text
    • http://bjeclinic.com/ckfinder/userfiles/files/87799132554.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/tosuverudukofoduliduz.pdfIn 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_off0000e995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE995 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A7 16336 bytes
SHA-256: 9985ac432274d1cf2734bf7507506940fe9b27c62734a22789f54cf96b8e8ef9
font_02_sfnt_off00012bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEC 10804 bytes
SHA-256: 116bab28c8e50d4a22895af990fc3aed60c6b50b484c2d12ea151f3de70a9ff0