Malicious PDF — malware analysis report

Static analysis result for SHA-256 4779e67eb345237c…

MALICIOUS

PDF

87.0 KB Created: 2021-06-25 23:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af00b5eb014a6c3fe351729032b7a51c SHA-1: b97f0880c4b199057a05e4526be8fbccf333ac72 SHA-256: 4779e67eb345237c4a0c7d66b5b902403cb4ff1400bdcbaccb5b9683499be97c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host and distribute further malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the nature of the links suggests a potential for JavaScript execution or redirection to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca85cfcdf66---zeluwaleverutopotifo.pdf
    • http://ahcxdq.com/uploads/file/03081229689.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f20376acfe---35763320344.pdf
    • http://anvlaw.com/userfiles/file/lenitazag.pdf
    • https://paperland.bg/uploads/file/72015709978.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/adb0e5s54thclefk0lkt5fmfjn/52662079354.pdf
    • http://efrex.cz/files/file/28613686004.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/fca1245eff2ecd200c4a6a880f1ab969/tejuditalimaxiludilu.pdf
    • http://deepakbatteries.com/uploads/file/turopuruxeto.pdf
    • https://gulf-rope.com/images/bulk_images/files/83022980089.pdf
    • http://kme-kme.cz/files/file/moregepi.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829afc1e744---ganamuwugozekawejizewel.pdf
    • https://medsplus.us/admin/images/file/razotiruwetimagutakabalij.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/qkm0q8qsaachcgd5g7ch3hvm54/8467146404.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d89a5d3165---suliwebanunoxazosimad.pdf
    • http://medicare-darmstadt.de/bilder/UserImages/file/vikibunofufizojen.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/uni8jdgnbvo9rms9due1ddsf76/lafofajenefupujuxubeneru.pdf
    • http://aliceinformaticasrl.com/user/pages/goxodabi.pdf
    • https://parklanehotel.asia/userfiles/file/62603249423.pdf
    • http://alpinedelhi.com/userfiles/files/dilofemuxifivazugul.pdf
    • https://paron-rebondir.com/uploads/files/15832618241.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/sa1rbqm11tte9iqs4md7mn42l4/sedidapino.pdf
    • http://matsonconstruction.net/userfiles/file/romugagu.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/0631a1a370d075f168805887403457d9/fixodegagenikowijikij.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/qrtio6kspovn53g4cdrqgc42k9/retezulemutupolese.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/c1ee85f07e927b2e74de4f67595978da/19208470778.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=sentence+parts+and+types
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DC 16792 bytes
font_01_sfnt_off000108ee.bin
d32f7163499988b32f45d45adb976843cdaa6458b11b0359d7609cfaf40992fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x108EE 17580 bytes
font_02_sfnt_off000136e2.bin
fa78629f105194cdc64031b05f0d08f22cd6f039de8e4cd8a66e1f90f1fa06d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x136E2 10436 bytes