Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6299753fe191787…

MALICIOUS

PDF

84.5 KB Created: 2021-08-02 15:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ca85478e1eb9b4f60c2f8a027830ced7 SHA-1: 2caa1d8a3917a3c3293b2375a9c5bc5b1a8e6178 SHA-256: e6299753fe191787cab6299e54e66e86fcf97cefdf4ea09d9ffea1f341b660de
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 WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://nomylo.ru/uplcv?utm_term=amantele+trecutului+pdf PDF link annotation
    • https://thefertilizerequipment.com/d/files/vibikewubara.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/47429737306.pdfIn PDF document text
    • https://davaocarrental.com/images/file/galatuk.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084f8e2d768c---tilunagobusax.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16095cc8539f88---27414057266.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/rolitalavexadu.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4bcd80343---64691019996.pdfIn PDF document text
    • https://masukpt2.com/contents//files/pifulukarajez.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/296608301.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/53636594364.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/a049af8db86bdbf419d337c44c93b0d1/zodufuze.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/o75d55kudv0vs08u8o7r2u3a46/56989107984.pdfIn PDF document text
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/femod.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/minimenokena.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607068e31d0d2---77170719400.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834c4ca08f0---69999800672.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/2kkr8vhpo58ddbhnif06vd828n/56365552137.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/3dbee8e48b1578706b50d4e6655a7aca/86259829597.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/fazupizakinewa.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/kemokefaxida.pdfIn PDF document text
    • https://securitydm.com/slicice/file/dukemajenetevalarox.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078132f303a0---xotiwabifadomolabipi.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ec4730c4a---49813218426.pdfIn PDF document text
    • http://mramus.com/fck/imagesfile/nalifigapetejovug.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/4632595066.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa80083a9d---36014788747.pdfIn PDF document text
    • http://hasyo.net/files/file/37554132142.pdfIn PDF document text
    • http://medicentrumbs.sk/spravca/ckfinder/userfiles/files/79599575956.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_off0000e6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B8 18388 bytes
SHA-256: 200beb12b82d5d531b451b2a26dbd1689d415717fb01634191aebc4813f9c1a2
font_01_sfnt_off0001144f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C66 10576 bytes
SHA-256: 59c60b8d81c83afa2d80c50b639cc983c50dc98cb14ad305f614f05d375e15cc