Malicious PDF — malware analysis report

Static analysis result for SHA-256 65069b9076fe5cb5…

MALICIOUS

PDF

85.5 KB Created: 2021-09-16 21:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 83c21b79718012568cbce42b416b0f98 SHA-1: 9b9c20b0c3a34d528e99c3466a1b855d6860e906 SHA-256: 65069b9076fe5cb5068bdef9b4fbbfcc6923764c8615cb03f293711af88496f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier flagged it with high confidence. Numerous heuristics indicate it functions as a link farm, directing users to compromised CMS uploads and disposable hosting sites. The embedded URLs, such as 'https://allytemp.ru/uplcv?utm_term=tagalog+words+starting+with+a', are likely used to redirect victims to malicious content.

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://allytemp.ru/uplcv?utm_term=tagalog+words+starting+with+a PDF link annotation
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e3867c0e2---bilupejazugezapuge.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/kipuvejumiwamesot.pdfIn PDF document text
    • http://leton.pl/userfiles/file/xejojup.pdfIn PDF document text
    • http://hrudolf.com/userfiles/66212676605.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/pajulej.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f72c680fcb---dololuvake.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/rusewun.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/sinuromidetodavezeterif.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/93475638507.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/46296439603.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/69330093727.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5aa014758---28729387428.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1614194b19b6f8---fupexorubenixemixerut.pdfIn PDF document text
    • http://tapestry.cz/images/file/files/sivedewikemotobumorakonaw.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///migelogukeno.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/kevuradojujanaxapele.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/gipoburulevupikix.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/44775842856.pdfIn PDF document text
    • https://ritascreation.com/userfiles/file/xoxulepovobejaduvopasuwaw.pdfIn PDF document text
    • http://prmakeup.com/Image/files/24605175711.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/45965765610.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/72903242377.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/73034316837.pdfIn PDF document text
    • http://shriramashramps.org/userfiles/file/96937655780.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/kaxerezumavexazodejulek.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_off0000ec8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8E 10444 bytes
SHA-256: 283e5b2e648a10880c81f7fd306af15c5cab8f59b8afa69a87da2b506b4559e1
font_01_sfnt_off000103f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F8 17128 bytes
SHA-256: f1783cdb3453ebb393345839414873b27c846d8ac643205d91d961f81142ff5e
font_02_sfnt_off00012fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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