Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9aaf3b6f803e48…

MALICIOUS

PDF

75.5 KB Created: 2021-09-09 20:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: de929ad616b301989c80ac94ee31fda6 SHA-1: 9d0eedc3a73103de0ab76ce97ef8fd50f3124b47 SHA-256: 9d9aaf3b6f803e4863ed8a795087f7ea3b32c14585b231617d428ceb9b85d08c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. It also features numerous external URIs, including one pointing to a raw IP address and others hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://coretry.ru/uplcv?utm_term=gangstar+vegas+download+mod+apk PDF link annotation
    • http://tbm-mova.by/images_from_html_editor/file/xuviwazozogun.pdfIn PDF document text
    • http://lovec.bg/root/ckfinder/userfiles/files/27119373726.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55318194660.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/64489179588.pdfIn PDF document text
    • https://jpt.mysmartedu.com/uploadimages/files/janoliwugavujepiloridez.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c222a078c---66648845748.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/batigurodaxide.pdfIn PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/23187512753.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/15541151939.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/9643868382.pdfPDF link annotation
    • https://imahima.xyz/js/ckfinder/userfiles/files/kekodalurubovafofirebid.pdfIn PDF document text
    • http://spec-so.ru/sites/default/files/file/tokilukunurosip.pdfIn PDF document text
    • http://kfgame.snailgame.ru/upload/files/20210909162025.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/50846420840.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/42357588312.pdfIn PDF document text
    • https://melz-feu.ru/upload/kakokur.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/74297062705.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16136178876f6a---pixovosik.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/32962742198.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/4df6d088fa453f29a437acaaf0b8ac48/merofex.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161316d83b5d6d---ravuwibuzojonubinotoneti.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/8adfe56da3d99fb4f0eb8d6e993132d7/zuxazawamomakeromuri.pdfIn PDF document text
    • http://kelkenaghshband.com/app/webroot/img/files/27094412597.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/tudiruvikerowodeworo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB01A 10928 bytes
SHA-256: 157e9e8418dd4b19b5cad3eb0fe52ddf9e5a03ff35135dce7593cfd90d2b4ac4
font_01_sfnt_off0000c950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC950 16232 bytes
SHA-256: 01cd0e4798e93fb086042d610f43ddeed7bf091af48aa863f5c4a4f61b651684
font_02_sfnt_off0000df25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF25 15524 bytes
SHA-256: 69e8cd640baa20d04f18a5a343e67a0d26a4fe64073a2d600886da4b34dbe5a0
font_03_sfnt_off0001064c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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