Malicious PDF — malware analysis report

Static analysis result for SHA-256 7264cc90e1bf56f5…

MALICIOUS

PDF

83.9 KB Created: 2021-09-06 06:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6930f7b7280ee4298e39e433490fbb13 SHA-1: 179f60e1772479f8a941f653e816206773c6f725 SHA-256: 7264cc90e1bf56f5df0c273e411c0be0f2533526cca42f83345ca999a1958c30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection as a phishing trojan. It contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted from this sample, but the presence of numerous external URIs indicates a strong likelihood of redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://torgradio.ru/new/files/file/54976119068.pdf In PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/43841682972.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160781fddd05ab---xogogizivuz.pdfIn PDF document text
    • http://kanomax-nsk.ru/images/muwonavevukusilemupez.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/pewuwofowelojososerew.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bd454747796---23158753001.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/ad27c1d2862919fdb48d29c56ce66dc2/tetawiresokilebobikofu.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f1c3d6fca---gedapupamudi.pdfIn PDF document text
    • http://rilta.net/userfiles/files/berijefojojedi.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/98117856438.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/sitegeja.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/eqa001iaibtheug2cbst6jitje/devufisu.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/43974147557.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/83873512834.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/56112097667.pdfIn PDF document text
    • http://newbusan.net/FileData/ckfinder/files/20210721_2A82F53047B5DB25.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/tabasenet.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e355d85e34---33938920627.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/luneponede.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/2gp99u7ah1dsvie57nftak608j/87113503022.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16087728095eb7---37711739681.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/surasasojaxilevetefeti.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/75201958173.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fa5596e95---jedepumurejuwazupofatobeb.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/dizanaderasuxeneragif.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/85380240059.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=28+saiva+agamas+pdfPDF 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_off0000e1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AF 10536 bytes
SHA-256: 9f6d48366d4ca35a9b299ce753db22ab02a74eea2025816c1d55cc24e583ad74
font_01_sfnt_off0000f98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A1 18944 bytes
SHA-256: 983e80d8c3a75fccb9b097915106b745692cc071903f78db1825e71802131299