Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0ad965f9017e6f…

MALICIOUS

PDF

72.8 KB Created: 2021-09-07 19:36:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7e503aa80cb1a8c998029dafeaf1e975 SHA-1: 241ff4d7416e7bb721a46e17492451fe090ecc0a SHA-256: ab0ad965f9017e6fabdf835aa8c14db1185012c9fa15e501e2d2efc887e97c2b
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple URLs, several of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure suggests the PDF itself is designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://bouveau-consulting.com/userfiles/file/ritalejudotuboxa.pdf In PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091991d2ec0b---66188422313.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/9227077170.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/24656553303.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c66478f148---56644506811.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/a3e76c465fa7f4969fdac83192bfaaa5/lamagegimokesewozabuvo.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/32338662645.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/gijawomeju.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/l8veuv67jqgt2uq9a66bou42k0/22221688787.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/cb5e2db372850c018c74aa2cf0a3c816/fegepebuwewofapebi.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c6b6aa43ba4df9ec1fa59004f6fcc862/27301857478.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/e797cc65064df0a0d3d4825fdcf3bc7b/48471042094.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/a23951ba3ef7c88ee22efcdae6322449/gojinuzewesiwetivexu.pdfIn PDF document text
    • http://dongduong.net/Images_upload/files/67069868627.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/bedofotasasanuti.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/lbhrs3vn9ltit38b1tb6rfg8fj/tetabodal.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/10262747524.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/3596f07751fab15866f42471736e086c/neziramefomajozidaber.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/zaxumutubakogokidi.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ad86cc5edc0---55798189466.pdfIn PDF document text
    • http://klefmarken.se/upload/file/fupusutibenorefoxatalupir.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/54124146088.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/23387363314.pdfIn PDF document text
    • http://jump360.co/upload/files/20210817194301.pdfIn PDF document text
    • http://enricobarraco.com/files/2334829887.pdfIn PDF document text
    • http://art-ball.net/files/file/76755456789.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160f2124770be6---51466821722.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=celula+eucariota+definicion+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_off0000bdc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC7 15668 bytes
SHA-256: 3520bcd733d02f9e2a379e3b8f090d61e09c6b86477dc6da7f4b795887cbb22b
font_01_sfnt_off0000e4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF0 10576 bytes
SHA-256: ea38caa1da2a5899ef7a3197949bf103f7eeafc9f269554b7a30201130d9ac1e

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