Malicious PDF — malware analysis report

Static analysis result for SHA-256 dacf9da916ee1eea…

MALICIOUS

PDF

69.5 KB Created: 2021-09-20 10:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 41a3bd11814559b24a88ebc54dd2a65d SHA-1: 322ace051ac514f10d387a4ad295961857125a14 SHA-256: dacf9da916ee1eeab49c3617c625ae2892312cd591d95b61079b38a1896677c8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains a large number of external URIs, many pointing to disposable hosting, suggesting it functions as a link farm. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a phishing or malware distribution campaign. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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
  • 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://drafthe.ru/uplcv?utm_term=how+to+get+into+any+phone PDF link annotation
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/0gu6i045a4tc7p5suijlbvlor3/suvatekexagu.pdfIn PDF document text
    • http://hnfhdc.com/UpLoadFile/2021090108453561477.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/38711845846.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/94426600407.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/guxeliguwodasige.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/90746628120.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/bipogitigovop.pdfIn PDF document text
    • http://alles-vom-schreiner.de/userfiles/file/lamawimavasone.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/uvr2o08js44duir0ckhupp0a4n/litowomajaz.pdfIn PDF document text
    • https://knoxvilleremembers.com/media/jonunotozedom.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/23452871379.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/nodutodatomu.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/9076736448.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/62240255049.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/87469369283.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/fomilibonotowubujur.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/debalozitefobamime.pdfIn PDF document text
    • http://annabarons.lv/files/files/11085896897.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/xapaxatujinagabokijadupe.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/75212642605.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/79277759963.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/zivikemirorolodapoziniz.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/getixegufufujebe.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_off0000b294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB294 10408 bytes
SHA-256: d042d14f0d196adc64c478f3e06e3b5d8d3b9f405644bc4d7c13874a5e9944d7
font_01_sfnt_off0000ca22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE234 15280 bytes
SHA-256: 7a3656fb67d743900d5934d279b5e0414caf95448aee40f02f2dd5e38ce8e545

Open this report in the interactive analyzer, or submit your own file for analysis.