Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad2e561d213ee5a…

MALICIOUS

PDF

82.0 KB Created: 2021-09-02 06:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 597139cb9183f80e097c31e3fe6e6962 SHA-1: 861bdb71007923e028de3d6d33ef8361384e6231 SHA-256: fad2e561d213ee5a854abf3a715176794c60cb70de7f63ea9146b775afa3c6a9
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to external sites, some hosted on compromised or disposable infrastructure. The primary attack pattern involves luring users to these external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://hdurmuslar.com/images_upload/files/fizena.pdf In PDF document text
    • http://davcpundri.com/css/file/terilodar.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/85102427929.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/betolorukiwufuwivojuwo.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/jegalib.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/61657559061.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/zuniwedejotunitosugob.pdfIn PDF document text
    • http://designgaleria.hu/userfiles/file/bumikifopu.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/foxufadowugumasopixupuseg.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/13702558081.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/v9q5fn5fgrqjtjqk0qp29v2jo8/bixobekivafesolizi.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/faroninot.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/mujimer.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab149733533---nepev.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/30d1f8d1145987a2c3963a90930db09d/junovibaseda.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/pejokiteridemuwofeduganur.pdfIn PDF document text
    • http://gotween.com/userfiles/file///35407516841.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610cea626daf1---2594243621.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/12528624111.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607763d886b91---fowedobivanozabunogajowew.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/43934826597.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078285fb5858---rabevafufegolu.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a8930d1b9---miroromuwulatixifuwaba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=carbohydrates+stored+as+glycogenPDF 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_off0000dc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43F 10840 bytes
SHA-256: 92fb92fc83663ea092496f47efbec39502f35b8624510666a78796bb5798075c
font_02_sfnt_off00010d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D17 16896 bytes
SHA-256: 8821c85f2f843f8f652a0268917c51e54fda7f7241c2bbb9c038757450b851e7

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