Malicious PDF — malware analysis report

Static analysis result for SHA-256 458aa281120ada72…

MALICIOUS

PDF

82.7 KB Created: 2021-08-13 02:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f8584c9b89e5333e924a8d4aae150e72 SHA-1: b3fe69bd071c791d40a94dd8e356444bbe246495 SHA-256: 458aa281120ada72fc121073d67ad83a601a10eb6606b28a3aa02c1df1fd80d7
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs indicate an attempt to disguise the malicious nature of the links.

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://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845bcf539d2---sarosewebifijitowun.pdf In PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bdca6c83d---vafogedipabolun.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/72335510867.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-6-23/20210623020929655353.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/ffd04328b4e99979c254923ec925d0a1/jokufaxofiwudupexabalu.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/1930840213.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fba92907da2---62691759473.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/lenebed.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/nibodoladojobedisut.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c90a701f561---67784640796.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8417a4b4a---78254720529.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/90469820475.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/27649324506.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/pochcvmnq89qfko2blkvro1su0/63691854809.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160949f513745e---vaduguxivewodemolid.pdfIn PDF document text
    • http://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/49249996520.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a968e5e6971---koximorigebugokaz.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c447f005dba---tepefagin.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/6119adcb3a0a49577eb42cd6ac87d903/75600615351.pdfIn PDF document text
    • http://bptramptour.pl/files/file/guxaxurepumarug.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/56422185279.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/boxemuteripedi.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee24c335327---77256378259.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=bahubali+2+theme+music+mp3+download+tamilPDF 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_off0000dd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD44 11348 bytes
SHA-256: c4b7a9a08a826762bd510fb4b9080cbb9b0183b6e6e9ef94ed6c51ac393207e4
font_01_sfnt_off0000f7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BB 17132 bytes
SHA-256: 98bc8fa5ea0999fc403b75524c3e05ef07fe436be916336e12f809a601397c6e
font_02_sfnt_off00012433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12433 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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