Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2c9e407f2b8222…

MALICIOUS

PDF

69.7 KB Created: 2021-09-18 15:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9daa709e6ae7aa67eec166143238e42f SHA-1: 7e1dc4821db948877cf8305874dcebf4afdfa532 SHA-256: ea2c9e407f2b82223e3c1f25c85cec21732dccd8e969a659faafe4d5cb092fad
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to various domains, some of which appear to be compromised or disposable hosting. The presence of multiple PDF files as targets suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 http://www.extramas.com/userfiles/files/nikumimixobasosiluloto.pdf In PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/tereripezipabavumekila.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/xafafajibeb.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2fc2adb37---gilukimedafifuzajuwejubi.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/rovuwex.pdfIn PDF document text
    • https://asiapharma.la/files/files/16971827966.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/64594262616.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16136b6d38cf35---butupobasoxozisanuwu.pdfIn PDF document text
    • https://migger.dk/userimages/file/60713628428.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/sojoge.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/manijetawabofatin.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/63839619371.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/46868485808.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161351f79c7874---tatoxagefaxum.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/28914505990.pdfIn PDF document text
    • http://effekt-film.de/files/file/nigenok.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/jokosofewakitatiteka.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/6872652696.pdfIn PDF document text
    • https://podgoricki-klub.me/userfiles/file/minogirasiwuvuxavolev.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/58217441229.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161332c354d876---kofazidev.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/salowobagobodizeduwe.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613e502791441---85794078577.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16144b353d6c68---71142368728.pdfIn PDF document text
    • http://liderzy.natura2000.pl/imgturysta/files/82662882940.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210913_075410.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=picku+app+free+downloadPDF 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_off0000b4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBB 10624 bytes
SHA-256: cc76773e277bd302391894416c98183b39526f4c820530239cbf1f00a4c96311
font_02_sfnt_off0000e528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE528 14616 bytes
SHA-256: a1604868cbd5117d3bfe4240c5b786be92cb8cf16bb36e11e9e0eca94e1b30b5

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