Malicious PDF — malware analysis report

Static analysis result for SHA-256 e796629499602a52…

MALICIOUS

PDF

76.7 KB Created: 2021-09-13 04:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: db5c7b274ed52b069832316f248049ec SHA-1: 6ea27aa566c9956a3720e7748c86cb08422d2a79 SHA-256: e796629499602a52c738318aded3e60e5c5cb0fd6a21ade37cafebdd05c634e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://makojudo.pl/zdjecia/fck/file/zixubiwaxajurimu.pdf In PDF document text
    • http://proclima-membranes.ru/userfiles/file/luminukezibotagirilasitu.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d53396be81---82769935721.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/goserasomizizifuban.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/xurikojarojevunegenifo.pdfIn PDF document text
    • http://gro-felix.si/uploads/kawijerezodenigudiviw.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/24855092736.pdfIn PDF document text
    • http://interstroy96.ru/uploads/files/dovafigiwuzu.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16132713328837---tifigutupowoxapusude.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210904153139.pdfIn PDF document text
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/16670637944.pdfIn PDF document text
    • https://msvadba.ru/files/file/dopijedatujakax.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/sosekaravigigep.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/goragasurasubojiredira.pdfIn PDF document text
    • http://yavuzselimvakfi.org/resimler/site/files/22760546465.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/lupowojabifejesen.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/miwigiwoj.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/kodetefodis.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/79060489540.pdfIn PDF document text
    • http://gist.adrianlechowicz.pl/userfiles/file/zusisubekivukuwara.pdfIn PDF document text
    • https://nissanzorba.ro/ckeditor/ckfinder/userfiles/files/texukolozakurufizos.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff52c56184---19720889174.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/jerefi.pdfIn PDF document text
    • http://ajeah-intl.org/fck_image/file/23803855942.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=live+wallpaper+erenPDF 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_off0000c625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC625 9968 bytes
SHA-256: 682914174bbef841c99ad871f0e6a530de69e4ad9f0d03464f13a25785865368
font_01_sfnt_off0000dc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF461 18496 bytes
SHA-256: 76cb2f94c81d25e9ba9957b4d24a5364076266cbc8378c36427a62b0e434bdd1

Open this report in the interactive analyzer, or submit your own file for analysis.