Malicious PDF — malware analysis report

Static analysis result for SHA-256 c485462a58c64e40…

MALICIOUS

PDF

90.5 KB Created: 2021-07-05 00:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 577f35d4427487c062b963e41b2caafc SHA-1: ee29e40f33bc5c2203d5a7c8253ce80daa617a34 SHA-256: c485462a58c64e4040f666279311d402513063263e0b44a2aac118c3c84680e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://philabc.ru/uplcv?utm_term=satellity+chalet+for+rent
    • http://pettwayfamilyreunion.com/clients/39389/File/dujap.pdf
    • http://arcenevents.nl/site/upload/files/26292349648.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6783ea4ae2---17550824074.pdf
    • https://eltonltd.ru/sites/default/files/uploads/96227441056.pdf
    • https://vieclambaohiem24h.com/upload/files/jogabejogu.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/iqiggj5d72ehn4quqi4j16p84m/83876973741.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aac0ac65e4---44262464746.pdf
    • http://tylerdaynursery.org/clients/8/8e/8ed7c4ff1d995b028c1180c1bccb3f4a/File/24296739790.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a008d923365---wofavo.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/p5jsbjo7r11f73o5n2o33tsas9/49188985442.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/dd6094c122a19c6e1bc6355081862ab7/jofuwirewujedin.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb6824657c---bafovuvolilikegojot.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160775a8ff195a---vobegusidikumebetu.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9965ab385---57440463885.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/cpu4ad8c694hlnqp8kfpndh69n/48834005668.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/916a5c3f414aaf6a421fac93eeb94554/jupapune.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/3pn5m3f6cek4ag7hl74k74kd03/posil.pdf
    • https://repare-ton-smartphone.com/userfiles/file/86074932601.pdf
    • https://kasihpaham.com/contents//files/selolabek.pdf
    • http://chickendaylacrescenta.com/uploads/files/59091969762.pdf
    • http://provia-events.de/pics/fotos/1/file/5155278685.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdb80ef1c3---tawajenuwimix.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607af077799cc---71620613337.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001318f.bin
9e60656be138937bc4534a79fe20e206bb9db8b437cda5be9fff4f54ae007513
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1318F 23824 bytes
font_00_sfnt_off0000d381.bin
4c0111d21506e01e9c0f1b5d55f4a4b07e020e7e0cb6493be42f1362ef11fc69
pdf-font-stream PDF embedded font (sfnt) at offset 0xD381 17540 bytes
font_01_sfnt_off000101d0.bin
c41e28e306e37c46bdf77959f39153cb3cf6a5ec89447f26dcae9da10804d81e
pdf-font-stream PDF embedded font (sfnt) at offset 0x101D0 10452 bytes
font_02_sfnt_off0001197e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1197E 16792 bytes