Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa8f7b5383bd9a8…

MALICIOUS

PDF

78.5 KB Created: 2021-09-13 03:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f38e0135a84123c44bed9c9738987bab SHA-1: 2f71aaec65f4b85056beb961adb1aaedbf47a989 SHA-256: 0aa8f7b5383bd9a8135946373b82b82394def6b3e45ba5967f5fc6240e4e2d78
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable hosting, indicating a link farm or redirection scheme. ClamAV detected this as a phishing trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and the overall structure suggest an attempt to lure users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5349

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://garglob.ru/uplcv?utm_term=best+free+tv+shows PDF link annotation
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1613b58e2dc096---gerokovemutij.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/daxajubaguvum.pdfIn PDF document text
    • http://muasamhangmy.com/ckfinder/userfiles/files/fokibaredezug.pdfIn PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/78184549371.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/munaje.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/32031126333.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/nidexire.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/54061154096.pdfIn PDF document text
    • http://turatabor.hu/media/49487066236.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/difewegukupitopuje.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/82217996546.pdfIn PDF document text
    • http://melabo.com/upload/files/pejopodibilekowogine.pdfIn PDF document text
    • https://benmoonpharma.com/userfiles/file/supakuvobazut.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/37765854030.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b50aad7aae---87517286623.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/sijetit.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/xavijokoruviduse.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/34378898778.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/60491819568.pdfIn PDF document text
    • https://seo-methodes.com/userfiles/file/31316184441.pdfIn PDF document text
    • http://joeun-it.com/userData/board/file/tovejazibef.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/fasedesekuvixed.pdfIn 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_off0000e163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE163 10112 bytes
SHA-256: 592daae47ca9c4bad1b11c4c780ca89d84c01a433f25eafc656b24829a478b05
font_01_sfnt_off0000f835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF835 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11047 18172 bytes
SHA-256: 4752ebc00a7c40616db5c1180203bac8af40fa7b3abfa62fdba8dacd323272e0

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