Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0c215fe2568d25…

MALICIOUS

PDF

82.3 KB Created: 2021-09-06 10:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2128c72c83f180eafeaa5664c9b5d128 SHA-1: e2aa56a71aecac5ccfeb9ed38a365f46bebd56f8 SHA-256: 4b0c215fe2568d25f49882b3bb9ade25c8ba0ea3ee5d2285196fc37e7ca52d04
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are characteristic of phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://archism.ru/uplcv?utm_term=modal+verb+definition+pdf PDF link annotation
    • http://shinies.ru/img/lib/file/kuvorof.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/60044625926.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/dae9f2f08aebad8eca9a1d1fb8391ca6/femiweluwujepatobepod.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/427a9ee4d8a872d29bf4bca7d8fa24b8/vedofalaxi.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/239ab6be9d96ebaba2564aaafb9c47bd/18869849503.pdfIn PDF document text
    • https://ckmandarin.com/uploads/gebid.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/c6fe8596fbe9282bd4f079704a2529d5/85797530339.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd200399a6---dilekiluzififot.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/dapoxufitovuzo.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da710131287---1609059542.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/lerupagigefegoro.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/nowabazivofegipetogebebox.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/0c335edd8d128792e553c95ad6e9a1c9/tufulovud.pdfIn PDF document text
    • https://aspirans.com/files/file/nezajenubuwo.pdfIn PDF document text
    • http://izdepskifamily.com/clients/1/1a/1adacdf247316bc4617b3617d965acc7/File/wiwezemu.pdfIn PDF document text
    • http://soundupgrade.nl/site/data/ws/files/5598837851.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/88424112700.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-8-29/20210829175652510852.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/cf62734872d33af57b3927686c1c1ed4/78322194814.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/pobevujixonozatuvojeju.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ummlvcvjkj11fc62h9n83trd80/82354284371.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/54305848981.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/poforububiwirut.pdfIn PDF document text
    • https://atl-50.com/files/file/24300853079.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/luvojevenivafifirutujon.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_off0000dd08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD08 17792 bytes
SHA-256: e801e4899bea5e281f41cfbd62cd1a825742d99e615c3cb40035608fc940bd85
font_01_sfnt_off00010bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CC 10524 bytes
SHA-256: 06797dbae9d43051269efe4b2b682c37102cdbe48acd50a05fe60d755812f2d4

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