Malicious PDF — malware analysis report

Static analysis result for SHA-256 932975aa977ca5b2…

MALICIOUS

PDF

81.4 KB Created: 2021-09-18 04:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1e754a1a45fc9240b3cf17a4ba987255 SHA-1: 7c1c3ad4f1fb0e7386d2aa05e72d736a5dd17cc5 SHA-256: 932975aa977ca5b2f2541c21be306f681270f12ae954a4b50cea36ebb430ab0e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=in+season+basketball+weight+training+program+pdf PDF link annotation
    • http://suriyedostlukdernegi.org/image/files/sinutevofujutupofog.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/70581420683.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/tagasekavumajirov.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a84602ebe4---wejiviku.pdfIn PDF document text
    • https://jasmijnbloemengroen.nl/userfiles/file/bonuvinexowolonilajapu.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/boxuboremewevi.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/gegukugegobijare.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/mofejiga.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/popokuxepopepidaperadubaz.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/famupefa.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/f713201404ce4660ea8e6be4fa5a21d3/5394359634.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/damotevasowegiwa.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/womimapigopatixezagubiti.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/161452ed351f36---dobikejexiridulifola.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/44969481961.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/jewanoworesik.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/37945238689.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/97939807583.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/34334265060.pdfIn PDF document text
    • http://locum-system.pl/userfiles/file/70926761580.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/52619524370.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/6311520613.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/34951189789.pdfIn PDF document text
    • http://karaokejdi.com/ckfinder/core/connector/php/upload/files/kixibumudiputezijege.pdfIn PDF document text
    • 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_off0000d862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD862 11212 bytes
SHA-256: 85407b5991f8b52104f914534e4e93f505ad8efa1667256882f5f1c065ba3e91
font_01_sfnt_off0000f20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20F 17624 bytes
SHA-256: 12d2cb939205c809bb5a4455a85ff384681833b8877df39ebde0d293cf8d1875
font_02_sfnt_off00011f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1