Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e71bfdf2268eb7…

MALICIOUS

PDF

86.3 KB Created: 2021-08-12 10:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9d9ae28cea68e7e643608a199e2c698d SHA-1: 42a01e14f4c55d75feee607da00df097ddbb4f77 SHA-256: 00e71bfdf2268eb7262808746beded324a851bad9b847a14e92db3fb493097ae
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to potentially compromised WordPress sites and other disposable hosting domains. The embedded URLs suggest a phishing or scam attempt, aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/79n44h70ag55seoaoo89e452f4/62316668840.pdf In PDF document text
    • http://woodbridgeabw.com/uploads/files/23014622894.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/41697727160.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202107170116501001.pdfIn PDF document text
    • http://nova-auto.com/upload/mujux.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/29593266035.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/227iqdtemath87tjnog3b5fcct/62669270114.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/65336864129.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/jitiperazodepetab.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/vuxekotunaranad.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/38465515847.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4540d91b80---zidadanifex.pdfIn PDF document text
    • http://xn--b3ct0dc9bc4a4g.com/userfiles/files/jipalegebosuzetefa.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/74888705368.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/dapimesipu.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/34583904108.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/3016fdccded6dea3bb1f7171afcbf991/migeranulejejasi.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/46032567140.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f5ffcc9b6---97983648289.pdfIn PDF document text
    • http://clingac.es/d/files/44658454383.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b91c202ee2b---94610175382.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077c79878c92---gefebetizirasetodizixex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=docker+compose+install+version+3.8PDF 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_off0000eda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA6 11140 bytes
SHA-256: b735d6328629ce3866140d2707d1fee9955130bfc95c975d444d763eeaed5d30
font_01_sfnt_off000107b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B1 16804 bytes
SHA-256: 8baf319daff816e575e174bfeeea86c931c218cfecfbdaee7ffb9ea13e82f8c9
font_02_sfnt_off000133ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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