Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb9c1bd30799296c…

MALICIOUS

PDF

79.7 KB Created: 2021-06-26 04:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4645988c9c5a7c0de2b1197c369c524b SHA-1: 2710857f3dc3205336772052b97e89e590dc373c SHA-256: cb9c1bd30799296c686b2edbe565c988504ad467da337e2f6cefcf475323896a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains a link farm pointing to numerous compromised websites. These links likely serve as a distribution mechanism for further malicious content, as indicated by the ClamAV detection of 'Pdf.Phishing.Trojan'. The PDF's structure and embedded links suggest it is part of a phishing campaign or a malware distribution infrastructure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • 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
  • 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.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/27fddm52dd3fl09sm95r0veeke/90785976043.pdf In PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/lgcqcvqp3989144fed2pop1ala/15890760320.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5ce058803---92315072006.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/82457962255.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608452d149d37---xorivabajokipilonu.pdfIn PDF document text
    • https://alutat.com/data/file/fimekajuwigit.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/4a50ace6efa2454c601fa82af4665f13/ruwamunupada.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d4f9467ae---sapozadufokomisakil.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/dbb74b8715b003f17eefd96429c48379/18829579708.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab761ccfc8a---jidazusemuzebuluseve.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c0c78e17d---80294980674.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/51de80cca25b266797d7b9979ae86c08/64525118539.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5b3792ad9---pokufulizubabinofa.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d65435ac3a7---55661997179.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0ce0bc071---roriwix.pdfIn PDF document text
    • https://aashianarealty.com/file/6939272213.pdfIn PDF document text
    • http://vetranhtuong.info/luutru/files/mavutedidasiwobonobupiki.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/9jvhiaj8f3i74ftsfbnlh9rjjd/rowowe.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c126eb2b12---konejovapesewujowi.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/95720677744.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7ede7c7d1ad8cec6dd70dc5737fe31ab/fujunurulefi.pdfIn PDF document text
    • https://nenanhduong.vn/Upload/files/sarikowol.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/watalixoxofajoxogipu.pdfIn PDF document text
    • http://screen.by/images/file/18367785281.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=difference+between+atomic+mass+and+atomic+mass+numberPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA41 17596 bytes
SHA-256: 42fc1a22f105090a523c7b36e86edb61de5408d74c22dbf14e693987e9b28d2e
font_01_sfnt_off000118b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1