Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e2412eaa2f23bb…

MALICIOUS

PDF

83.1 KB Created: 2021-09-01 22:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 787bda613d63abe33e8c04a5f696df12 SHA-1: 2a148c169915f533ae3bf41df46e630aa9de4646 SHA-256: f0e2412eaa2f23bbc92563dd44af69ff3d79c0e2a2aa20bff44707065b0b4c02
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://irlanc.ru/uplcv?utm_term=manual+cars+without+clutch PDF link annotation
    • http://naso10.com/userData/board/file/vewakeduxumaxaviwawurol.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/9c98e60823d5021abd6a2908ad0ac955/pesuri.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/da5d09d6c1decf4b5cda8f4768f2487a/29924012194.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080677e4cbe6---jinora.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/sazuz.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/botimazidelud.pdfIn PDF document text
    • https://makenie.com/upload/files/mazoxesaniwevexulevuro.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caa8c034f4e---famirubekapudodi.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/71903533971.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070ee97e29cb---saxekovomo.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/bukazuzugagilov.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents//files/72408091029.pdfIn PDF document text
    • http://hncastlecable.com/d/files/10662009135.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/fuwenamorizufi.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/nojetiki.pdfIn PDF document text
    • http://usagimatur.com/files/others/pekudu.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/40635950953.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/j3qj42a16k9hj7qokju25g3bbj/fazedinofoginaxemije.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/72784169759.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/murerenolefakigevixabafe.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2e234fe96---25579583686.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec4ed5fbaa---60717057046.pdfIn PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/87141727185.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_off0000df80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF792 17968 bytes
SHA-256: dbcfbfc57ac36e08679dd19c4d6b74e2bbc739b3bd76034ab73a5c947052d4c0
font_02_sfnt_off0001267a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267A 10372 bytes
SHA-256: bc8c3ae9f6b3003a5b7fe8ae99ef32f4939f14df68633116df981516622e4cc1

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