Malicious PDF — malware analysis report

Static analysis result for SHA-256 036f9245291e88d6…

MALICIOUS

PDF

81.0 KB Created: 2021-09-18 23:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 90c70578a93c9648f827945e4933c944 SHA-1: 985beb4f3661612c088d684242cbf6cb9516dd93 SHA-256: 036f9245291e88d62e550e7c375a63815e7e5dc29ccb51f877016044de0801f2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial security scans. ClamAV detection and ML classification further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://garglob.ru/uplcv?utm_term=transfer+photo+from+iphone+to+android PDF link annotation
    • https://cochleartudaskozpont.hu/files/kobefop.pdfIn PDF document text
    • http://gensugroup.com/upload/files/rudowarufitaxobufurofot.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/84125577668.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/742f35108887c9c48cccf95d14b2b3d6/pubibuxuxejatigoxoparag.pdfIn PDF document text
    • http://vitrine-prof.com/files/movebilovulasewejebowoga.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/mifowulurivujogutop.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/49489781904.pdfIn PDF document text
    • http://jingmingtai.com/filespath/files/20210905115011.pdfIn PDF document text
    • http://baovecongtruong.com/upload/files/99076916925.pdfIn PDF document text
    • http://odra.cycling-recycling.eu/imgturysta/files/20398893683.pdfIn PDF document text
    • http://flex-link.cn/uploadfiles/files/95225633585.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/pasunok.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/66364976231.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202109041722511870.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143094869f49---kufijekokaxamekatuzalipaf.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/gidub.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/12664762185.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16133c00fa3d9e---5556767652.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/wamepiwumopexib.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140081c584d3---mupokafituwejatitof.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/36412775928.pdfIn PDF document text
    • http://mskgroup-spb.ru/upload/file/47492868931.pdfIn PDF document text
    • http://olympicthesportshop.in/uploads/popofafid.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/26780966653.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_off0000d3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A5 19628 bytes
SHA-256: b0eff93d6567e154fda17afcd327c0a17cd6c24add7fd175cf0f213416813916
font_01_sfnt_off00010625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10625 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3C 10680 bytes
SHA-256: 923ca86e2697a7e7120a787a301a15ac02e26b2d056b7b4dc9f971e73210456d

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