Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb47e98c09eae9d…

MALICIOUS

PDF

82.6 KB Created: 2021-09-18 20:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 67ecec8f947ff4ba429ba04474386c10 SHA-1: d693f5561d39afb403b27f93ffa0091b6c696a78 SHA-256: 3cb47e98c09eae9df42ecf91dff6b6dc638ae327ff563a0085eeca7f037a280d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, with numerous embedded URLs pointing to compromised or disposable hosting, likely to redirect users to malicious content. The presence of multiple PDF link farm heuristics reinforces this assessment.

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 http://abwmechanicsville.com/uploads/files/34047246885.pdf In PDF document text
    • https://kvzriu.org/images/file/37834350091.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/sotetajurufadawosezavas.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/41614689791.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16143b93b76fe1---jovogulovasexila.pdfIn PDF document text
    • https://majubesar.org/contents/files/907430840.pdfIn PDF document text
    • http://rotang.net/userfiles/file/57056730646.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614155bc9b459---64805595319.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210912012939_g9wz5i.pdfIn PDF document text
    • https://olterus.info/contents/files/3078920842.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210909081442.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210905123805.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/82579869970.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16143c0f64cbbd---ketijudodagepafuserefumu.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/jugumokoseruvub.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/deqrnckjdmequli3b1srhumbk2/kevapadinizamobimenagim.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/44284443728.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/ge05dmoi5qsome32m6ft5davqv/jokiwebewivununuva.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/jipegodifedeminati.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/74552795919.pdfIn PDF document text
    • https://ahha.az/userfiles/file/88924760838.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/15252560674.pdfIn PDF document text
    • https://tch.lu/files/files/96846133929.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/zimilatewuziwirelog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=pocket+dictionary+for+androidPDF 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_off0000dcfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFC 18420 bytes
SHA-256: c7e34966b80991ea547596a597d5272af1d7d8e49f4e3aa5ddbadb868d496566
font_01_sfnt_off00010c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5C 10460 bytes
SHA-256: f02bc64b69c7f65e9547b2f60113d053a92ed334f3013993c27a95fc9df6a0cc
font_02_sfnt_off0001244c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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