Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9ae0709a6df88e…

MALICIOUS

PDF

78.6 KB Created: 2021-09-18 10:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 93004a9df5b5aa8445bf1248735ff69c SHA-1: db1cea7d82226cb4b04d8d0434a06da540b6495e SHA-256: 5d9ae0709a6df88e6bca940814e0e47d904ea69b1cafc9bbed31cbe2d4569714
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the execution of JavaScript to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nomylo.ru/uplcv?utm_term=farm+ville+mod PDF link annotation
    • http://hiro-seiko.com/upload/files/32551693324.pdfIn PDF document text
    • https://miet.hu/kepek/57747374437.pdfIn PDF document text
    • http://ccsilver.kr/files/fckeditor/file/13128512096131a52e82c7a.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/23702716161.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/65511533985.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/migurunokevaz.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/labeganebuxodisupibobusiz.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/12873298670.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/94790901499.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109100348319211.pdfIn PDF document text
    • https://gogift-it.com/userfiles/files/98575587043.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/82770331314.pdfIn PDF document text
    • https://cowik.pl/upload/20130156356.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/18198033622.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/80890666785.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/ludevilidunalofanebam.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/wogojeputumudixemofelame.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421214d3dd8---fapebowape.pdfIn PDF document text
    • http://maudchristan.nl/ckfinder/userfiles/files/80672428625.pdfIn PDF document text
    • https://vinocastillo.hu/editor_up/96802444258.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/bikulevidibovukeb.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/tujuwesixopiwikijaxola.pdfIn PDF document text
    • https://www.thc.gda.pl/ckfinder/userfiles/files/85961689125.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_off0000cd46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD46 10084 bytes
SHA-256: 95cf41053dd3cee6b9caf8adc6681355fc136af186bb045e97d60b4166b259e2
font_01_sfnt_off0000e3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC0 18684 bytes
SHA-256: fb0d1834b763717193bc3f4ff3cb83df1cc40f1a0560ee3732bab9917c065dac

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