Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccc2824bb8dace1…

MALICIOUS

PDF

88.5 KB Created: 2021-07-06 22:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2b0f63dbd7bbccf38bf508759dda5ad5 SHA-1: 57812d1cb272fe4c5ca8af8e3f7eb6f61bbc4319 SHA-256: fccc2824bb8dace112ca69cc5fca9e418eeec97fab0819e8549d766a37fcbd38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a large number of links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm. The primary purpose appears to be directing users to malicious or compromised sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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.
  • 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://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160757f56c1bbd---34000741290.pdf In PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb36d22f53d---98515209748.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/76105092020.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/lanodujuwijizewinil.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/80176936263.pdfIn PDF document text
    • http://healthywithhart.com/res/file/limegabisiwosul.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/doruwulekuxa.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/zebijoxopogasanozafi.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b4397ee50---61991843245.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/97599578588.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609275b37f187---bifiwawinurinukewivawo.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/118a70cf1fe0d2bc5d61cae4815747af/vitekefesuwolinitevevu.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e788e2927c---tiwasefonozamupuwed.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///76824020106.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/74a2c72d5fe1d85353617baa1a963d14/59718760224.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/cda8c7a85b5b96fefba13d17043dc4cd/29800585495.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727ab8adfd6---97697505385.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607a21e0eea43---36386457626.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/95131834189.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/nosuj.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/93082295824.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=also+too+either+exercisesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000f67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67D 17700 bytes
SHA-256: 50c1dbbd8a0d6dd863a171756999dcc4ecc3413a1baae9d1ab3a25f2866236f6
font_01_sfnt_off00012452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12452 10144 bytes
SHA-256: 85f755c87e0b034f323fb8fdfcb3b3d7e5668403a8f477a904d30996224319fb
font_02_sfnt_off00013b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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