Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba66bd573f2bcb5c…

MALICIOUS

PDF

74.3 KB Created: 2021-09-05 18:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ca46ba0dc4d02757702723d28803352f SHA-1: e080cf0e03b2193e9b4c377717b8cf1170f88711 SHA-256: ba66bd573f2bcb5cf83e0a02fd0cc034078de43493d3f228291263add8c138b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to lure users to malicious sites. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/0107bb7751765a3e7148d0708d112844/nejilidudakaganoja.pdf In PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/gn10oua4fi4m6979pit4ipecrq/fudosawofi.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/vukapis.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96ae4e4ec5---pafafuvadegejifojakigene.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/2776ec76aabd84ee4726627c2d4448fa/muzebisumeluj.pdfIn PDF document text
    • https://skillmapmagazine.com/ckfinder/userfiles/files/sifedoguvel.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/33281892456.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/jiwewufezilufaxiwed.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/weduwowudujipevekifibiro.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/wulikek.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/5a1f1fcf2e980ee3c8fa6644e4b5f43f/57232561635.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210817050037306.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/wojimuxibugig.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/10343136329.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/1022707962.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/d73472cf66e080cb48e978007a9c12b9/nabaxi.pdfIn PDF document text
    • http://doverhighschoolhalloffame.com/clients/2/2d/2d76883e1086210ef8e2c43836b0327f/File/lapirumejiwonuzuxebufobaj.pdfIn PDF document text
    • http://ximangsongthao.com/app/webroot/uploads/files/vidokamu.pdfIn PDF document text
    • http://mrmax.ca/clients/9797/File/wuzezem.pdfIn PDF document text
    • http://becucci.it/userfiles/files/44291161868.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/zesegasine.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118ca14ab350---kizeras.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607173cb1fb32---furomozimub.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/35364409861.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/d2ed1725dea821c312ac2b5fa1305d89/dupojataropajab.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/65296839058.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=aristotle+nicomachean+ethics+book+9+pdfPDF 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_off0000bcc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC2 17232 bytes
SHA-256: 47daf99112aed7a1782482ec1c3feb78cb543f2c05474c84020b4fd38b27959e
font_01_sfnt_off0000e8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F8 11264 bytes
SHA-256: a3078ea3e100c816c0cdcfb3ee70c1e54d05b346edd421df17988532c901ebad

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