Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc4ea07f817127f…

MALICIOUS

PDF

97.8 KB Created: 2021-08-20 13:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 585d07e999bba8767e589b66d20e6cd6 SHA-1: 2e35709e0e6271c66b9f64d9500854dca5d7b1cf SHA-256: ecc4ea07f817127f65d1efad30424cb6afdb7a40e184dacd39830b350cdd491a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. The embedded URLs, such as https://pixomot.ru/uplcv?utm_term=banned+from+equestria+daily+1.5+games, are likely intended to direct users to phishing or malware-hosting sites. The PDF structure and numerous external links suggest a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://pixomot.ru/uplcv?utm_term=banned+from+equestria+daily+1.5+games PDF link annotation
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/9c11032258c2e6882ade14ceed2bd16e/kexezelowajelire.pdfIn PDF document text
    • http://szalkasszorutacskok.hu/app/webroot/files/content/files/bevopamibufivimutateji.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/22150658319.pdfIn PDF document text
    • https://x-software.cz/data/file/mukizaz.pdfIn PDF document text
    • http://e-sportis.com/images/upload/489308522.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/vivizexafigunufaferosake.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b8132b6ac---90923781888.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/23844944522.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/742bbe488ff81a8c1fdeb40b40de55a4/33942541592.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/88080878264.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/wuzotowaropinivas.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/16ac155bcce54c91405bece78245421f/bibekimaxowaremox.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/netabutuxageromuxi.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/kewuga.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc230696b9---muduxu.pdfIn PDF document text
    • http://lroundup.com/clients/d/d7/d7466da0ad72d96b64793f89c518a0d9/File/1244326793.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/509d73ddd37a9ce9168fff450cab844f/35354722602.pdfIn PDF document text
    • http://maksimetall.ru/files/lavizosiraborumikede.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/104cddf2a73d4bdc23cec5abd1612a2a/fofuv.pdfIn PDF document text
    • http://polenes.cl/userfiles/file/8349295768.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/m0tb2ov88im4mb38lkofb7g5s5/popalok.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/diluru.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_off00011a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001324a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324A 11364 bytes
SHA-256: febeedea01c1b435dbc6a6a1e6dcb89eb8b6de2777ab45fb92b6ef336f6fb099
font_02_sfnt_off00014ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CA1 17016 bytes
SHA-256: afdbd4b9028fc4fca9f601a6f8de9bde5283670292c64ccbe61117535a8cc3eb

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