Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9269bf425818db…

MALICIOUS

PDF

82.7 KB Created: 2021-09-18 08:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fdcef2b699de96752d7365171ba626eb SHA-1: cd0153e8f1e4a131e0410061d38de91162390869 SHA-256: be9269bf425818dbd506a56eb7972c02fbbc45c806214fa2b109285f930c6574
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links to external websites, many of which are hosted on compromised or disposable domains. The presence of ML and ClamAV detections, along with the PDF_SEO_DISPOSABLE_LINK_FARM heuristic, strongly indicates a phishing or malware distribution attempt. The external URI heuristic points to a specific URL that appears to be a lure for a game hack, suggesting a social engineering tactic to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://chcial.ru/uplcv?utm_term=download+harry+potter+hogwarts+mystery+hack
    • https://tapuionoticias.com/ckfinder/files/76872344287.pdf
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/22924064782.pdf
    • https://penal-garazh.ru/files/77894769329.pdf
    • http://akkoryazilim.com/userfiles/file/81212744724.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/aljq7qri4homcasrror7701lc7/sisowiw.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161456cec9e084---80005274874.pdf
    • http://pospatrans.cz/UserFiles/File/19309333063.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16144594288e2e---zexona.pdf
    • https://divetechmarine.com/contents/files/44574579517.pdf
    • http://cherryontop.pl/upload/fotki/file/30832682633.pdf
    • http://purofirstli.com/userfiles/files/40698845630.pdf
    • https://abofahed.com/userfiles/file/87088281254.pdf
    • http://snap-drone.com/userfiles/file/81781598899.pdf
    • http://achilleferolla.it/userfiles/files/19462631014.pdf
    • https://psfund.org/public/uploads/files/cms_files/27562387906.pdf
    • http://tangneylaw.com/admin/images/file/78959322591.pdf
    • https://leganordavigliana.it/uploads/file/katakelinedebaroti.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6fb99ed04---70171516541.pdf
    • http://imhang.com/fckeditor/userfiles/image/bubotekigaginixojag.pdf
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/nixarizupaputixedoxexu.pdf
    • http://vivatbacchus.hu/files/file/bajidinomel.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/jk17m3akuhbduf761hkdsj673o/51011391209.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16142a5243e05f---941020531.pdf
    • https://sma-dfgg.org/site/admin/file/puverunibotipeba.pdf
    • http://tatnhapkhau.com/ckfinder/userfiles/files/maxexele.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_off0000ddf6.bin
25003d3a82ea1b5d6885e97699927fdb9e63b6322d105147331e678657b79ec7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF6 17340 bytes
font_01_sfnt_off00010ae6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE6 16792 bytes
font_02_sfnt_off000122fd.bin
70ea920b227131c9152e878428f4ab88aee6179d179c03ed04ae4b864a844c71
pdf-font-stream PDF embedded font (sfnt) at offset 0x122FD 11164 bytes