Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd9238f9478ede0…

MALICIOUS

PDF

90.7 KB Created: 2021-07-02 20:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5ea95d4fe49d3a2cd46ab300e7db34f6 SHA-1: 0dfaf7ac5f08e7b27f84e400242ce389f59b20e0 SHA-256: 3fd9238f9478ede0084cadcaa80995a595bc60ffce5d1354eaa37cf40611acb0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites that host further malicious content, likely for exploitation or phishing. The presence of numerous links to compromised CMS upload directories suggests an attempt to distribute further malware or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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
  • 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://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/aab21f1feba7708cf0ad7bf465d50017/54554792340.pdf In PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/539608058a27253aa369c4b258937257/gupojog.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a94264d41cd---viwulamolidepuza.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/rvrgg8750qej3d2gh907ra6vt7/31781255066.pdfIn PDF document text
    • http://fotossc.pl/_files/file/bukukelivobiwotegafodu.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/ua8t7dq4k3j54h6ohbm955oi8t/21708976065.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/125b3f37f85035647bbc7f4df76ee461/zivuxagowesunusuk.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/66feeee4dcd3998617c34ebee09deda9/25944423696.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607c57eabd759---44639977341.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60B24A23025AC.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/huh410o8781rdk18hthu097ng7/93447784297.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/562ab1a4e84d0eb26906dc3a74eb3b35/xamuvulogav.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a889688781a---32282066097.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/t6iltb6uemuhuqqii002vpecn8/25386840941.pdfIn PDF document text
    • http://sun-eko.eu/files/file/97744650097.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/55846138250.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/22914610911.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebabe646f5---zenumokozeguriwekatof.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16098a5a859ef1---88865165952.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=planting+in+single+rosePDF 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_off0001024e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A60 16968 bytes
SHA-256: 060db987882e31e39e5fa7343b80f5e73da5faa1765270b5e56ef3d3a8fb68fa
font_02_sfnt_off000146bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146BC 10284 bytes
SHA-256: 15774ba228583b623b5304dcd5a7ddfcf45b106855aa6732fc2b0b63531c2c1c

Open this report in the interactive analyzer, or submit your own file for analysis.