Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd78ae7f7034c3a…

MALICIOUS

PDF

84.5 KB Created: 2021-07-13 22:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 76602ed047c7fb2dc195f3f203e0686a SHA-1: 20ceea8f09c76c7b6393cbf3f2ccbc0fc82c4bc8 SHA-256: ccd78ae7f7034c3a0bedf82e0371a6940f0f8cf1588006f4ddbd85a4da7ea7e5
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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 http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1bf3275eb5---6589611564.pdf In PDF document text
    • http://meadescafe.com/userfiles/file/6700381982.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b1572e448---nelobibekisimopi.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc9258ce1f---67978693481.pdfIn PDF document text
    • http://apcmagon.com/userfiles/tisevezumupas.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb599181f7---rikurugonir.pdfIn PDF document text
    • http://viajesalaos.com/webroot/img/files/pulofufizalokewikojewuwoj.pdfIn PDF document text
    • http://parkettes.org/clients/b/b3/b30d687fb0e6fb0c44210170e51784d9/File/numotedawulolopoxedol.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/47fe3c88ace0d0ce47c16131bc523c0b/41659000617.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/doxuwid.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/luwomepuxidibux.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/fd8d5d607bc5e98e7344ba3c0942fd3f/mapaxajuwefu.pdfIn PDF document text
    • http://abwvictory.com/uploads/files/27018105919.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/39htqb8dfu63ldoc1agu7nnu14/dodoserenalesamizebe.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6b8866c99---tubuponokasejuvoturufifo.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/fatefovosavolo.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c1304e3fe---85954928956.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc14bfa2fe8---sorijiliditibirej.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f384427dd---99441919281.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/jufisumivedozafalibesima.pdfIn PDF document text
    • http://ledson.ru/upload_picture/31532881266.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/49124341876.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830fb71d20b---63372816126.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/24353078625.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=natural+point+tonkinesePDF 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://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_off0000ec58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC58 10412 bytes
SHA-256: dc1403f60f25a1b32a11b91554fd8be6c98847db088a051017e457348770691d
font_01_sfnt_off0001040b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040B 17416 bytes
SHA-256: 7611262790281c42b855b529017d4e90f75f69caccf7debda1daa5f2c9fa9cfe
font_02_sfnt_off00013189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13189 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1