Malicious PDF — malware analysis report

Static analysis result for SHA-256 01de0858b0588113…

MALICIOUS

PDF

90.9 KB Created: 2021-07-03 22:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 408e687b324e04c2ac3c953b4c7e5eac SHA-1: fe0e688e835db37be587f734b33f25bb1732ea23 SHA-256: 01de0858b0588113b562b65385b4782005e0fde15454ecc40ab6739b184c92b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to various websites, many of which are hosted on compromised CMS platforms 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 malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to leverage external resources for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://fitviewer.de/files/file/pugoguzisizugekawef.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/73495ce97d38f9bd088e242ea94ec520/zovesesekemefutotinegoru.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160707b9263842---witizo.pdf
    • http://beveragesgs.com/userfiles/file/83763762705.pdf
    • http://dilimkebab.com/userfiles/file/23615214932.pdf
    • http://bulongvungtau.com/media/ftp/file/vadojawubog.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/0bed85e34bf9a2b0865780f4e7eb6c02/bodutotudegozetazisufugi.pdf
    • https://aduanaldelvalle.com/userfiles/file/37363246259.pdf
    • http://www.jindatunnel.com/up_files/file/gagesoxizexas.pdf
    • http://kayamedbursa.com/userfiles/file/4152315788.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/08c76a1cbd48138f224c4c05a22eb82d/wujajawemab.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cce7d7d96b---30824685364.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc31e216345---bizutuduxurafefoxixi.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac902861e0c---78638101818.pdf
    • http://toeicspeaking.net/_UploadFile/Images/file/51898506390.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16076fd2555dba---79452113271.pdf
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/79841626739.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1b82756d1---6925098809.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b977a3b5a7---xasos.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/50v07oeaj9mqftgsr01f867r1s/76767594374.pdf
    • http://abpaluso.com/upload/file/28251668731.pdf
    • http://jpcadonate.com/clients/4/48/4863a0bac697dd4b44f4a1b1fb44835f/File/tajuwudas.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/un7a4f4fr3dedsu9ati61p6pr1/57699955117.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606cabd5c8c38---nuwukupela.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/d4ac38d40bb4e3bcd89f9a9d0d72d7fa/negajoreriv.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+do+mail+merge+in+outlook+from+excel
    • 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_off0000fbbf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 16792 bytes
font_01_sfnt_off000113d1.bin
3e6d750e823a0a7d510e17bdc1f80fb0070605685c8141bb1291a0192aa44a85
pdf-font-stream PDF embedded font (sfnt) at offset 0x113D1 17952 bytes
font_02_sfnt_off000142c8.bin
7c570abfa4eb816f5aff5bcdeaa95e89c79cdf43a04a2737ef3d66ecc194bd0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x142C8 11024 bytes