Malicious PDF — malware analysis report

Static analysis result for SHA-256 e694ab19eb819ab7…

MALICIOUS

PDF

88.0 KB Created: 2021-07-02 05:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06a608893df0266fa4c62b2595d7effa SHA-1: 5db277eaddcb3a99c6d7c34a6e49435a97db3072 SHA-256: e694ab19eb819ab7ca253aebba495f175f3b5bfb9ecbe67d7fdf1e9ad66c7cee
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to external resources, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The embedded JavaScript is likely used to facilitate the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://travelshops.pl/userfiles/file/motifugepojumageberawete.pdf
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/53748894791.pdf
    • http://buyyoutubelikes.com/ci/userfiles/files/6328251202.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af419c5971c---38327887232.pdf
    • http://wintec-samu.hu/uploads/files/2083398274.pdf
    • http://annandale1963.com/clients/69704/File/59260283842.pdf
    • http://dlt-nkp.com/fileupload//file/81717377150.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ca8e89966---maxefisedebuzipexizapule.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f978617e6---83147992823.pdf
    • http://keyflounge.nl/userfiles/file/rosomejikodusujitixi.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/d0d365654d9254258f01db154dc35c65/lodepugelavelobejamegopuk.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc24346a52---suxawiserinoviw.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/qk5rli2nulvivqfn7fqm7imsdo/nakemotufijugotafupa.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/cqr5bb1a0fi2h5n3i2ae1dsodd/sadovivezuwogogakud.pdf
    • https://flyfinz.com/userfiles/files/rozutowovitijetugogire.pdf
    • http://amandamaitland.com/images/file/19663132532.pdf
    • https://fedico.ca/upload/editor/file/96609583689.pdf
    • https://www.mds-horizons.com/upload/files/46011042789.pdf
    • https://rybczewice.pl/userfiles/file/xuporuzaz.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083def7369ba---dulerepobi.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085988f5d0c3---fazopamozasadogege.pdf
    • https://fleschimmo.lu/userfiles/files/mosowujebijurepukum.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/30f72a5cbdd8eff94f7f8547a4200bb2/siwozelezasilomo.pdf
    • https://tailormade-sales-marketing.com/userfiles/file/rezarunokadebuwabog.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd85cb4fed---17993735656.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/v56poob2mo34asrp71ls4gqnh5/18302410920.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/50mdit8jpdqtilaejvpj95qat6/ditoz.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=spiritual+values+meaning
    • 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_off0000f6e6.bin
cdaf60fbd90ef5387aeee1273a146fe5238c11e4a701f4d2c03a31f2587468b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E6 16736 bytes
font_01_sfnt_off0001226e.bin
cf2111bad534b8edb4e7a8694295a9dec162cf2a77f8256f922279adf613d3b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1226E 10716 bytes
font_02_sfnt_off00013b0b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B0B 16792 bytes