Malicious PDF — malware analysis report

Static analysis result for SHA-256 c185655cf1c048fe…

MALICIOUS

PDF

80.0 KB Created: 2021-08-31 22:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d9d3fd9f0cf7cdc6a6c5a7144032bcda SHA-1: d85abbfa8d6b473461ea3a46d9143ace3be5ad4f SHA-256: c185655cf1c048fea89d935c150104c56310859a9a6a433372c5d6d7c51ddf7d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to a compromised WordPress site. This suggests the document is likely a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/2b2be35e645b90b0408b5d563b26bbe3/29683128037.pdf In PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/wotadojaxolewaji.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/varigilanoninej.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/19806146089.pdfIn PDF document text
    • https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/79646294468.pdfIn PDF document text
    • https://tungqibiotech.com/upfiles/editor/files/vowubuximufator.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/fe305f6eee4c958655710119e165284a/1254000537.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/dedazed.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160710fb16762e---32746202067.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/tagokofizopekedu.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e57ebe2ce3---dukelowofoditotoxuteval.pdfIn PDF document text
    • http://geniuschulatutor.com/userfiles/files/kujitu.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/bafasajed.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/vefoxu.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/95609510733.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28ef67b77b---filel.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce2de8865e---gufirifiketop.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/tejoxunolelugudufatatoliw.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/venabogisezusoneja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=halibut+and+capersPDF 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_off0000d427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD427 10620 bytes
SHA-256: 1ba080ea1bbfa5dc01d3e6b8ad34ab55d7655627a472ded3e6fbcb2a98425ed2
font_01_sfnt_off0000ec3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3C 18068 bytes
SHA-256: ba2230a932c5853a731bc3647262602ad586213a2731fed8b7f03ac65d6ef803
font_02_sfnt_off00011af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1