Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab63d4df8f8a7e1…

MALICIOUS

PDF

91.1 KB Created: 2021-09-05 08:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 35a1c71c34de7a270dee63c006a0913a SHA-1: cc245f985d15467fd6556c6b8b26eef0d0169a78 SHA-256: dab63d4df8f8a7e19dff17ae57ee2429c030ea0674cd15af965b572703e5146b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many hosted on compromised CMS uploads, suggesting it's designed to redirect users to malicious sites. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of multiple external URIs and link farms indicates a phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e2b0995ce---28952907180.pdf In PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123ae06ea77d---binedopumudurezonepawamos.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/6852258382.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/tasivevikezilafuwekafelud.pdfIn PDF document text
    • http://cocoal.com/uploads/file/pogidositewigexawotif.pdfIn PDF document text
    • http://gfhs1978reunion.com/clients/56625/File/pesejoxedawixuk.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa883d3a8a9---12715610626.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a83eb7a5c60---72440683126.pdfIn PDF document text
    • http://haphadoor.com/upload/files/boraxodewaseminifuzawaso.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/57r7gnv84ll0sf8snifv4c2bst/tugafenexumasekuximezure.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/kovimutuwiduzutu.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92fa5523ba---72578904722.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/483439900.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/a43ce944024e09c1a6232f37e7c88baa/38302921801.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/tikebugavurazixoxirame.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/24128542531.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d03d2d2222b---xejekowutajopa.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b172bd70f---76957058602.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/vamedekifumi.pdfIn PDF document text
    • http://music-saikung.com/ckfinder/userfiles/files/76419227884.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/33ecdeb3205372cf26a753bade5ddd08/83746273513.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/16363206872.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607433899adec---18080987413.pdfIn PDF document text
    • https://kopari.hu/files/file/50697878723.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d7865bb1eec---84998030140.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=free+phonic+worksheets+for+year+1PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 10852 bytes
SHA-256: 0ab70e0ae7e8f526b2907fa3603a125054876527ea16d1b5a7397ccc28325e61
font_01_sfnt_off0000fbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF9 18732 bytes
SHA-256: f73df754bcfb43b5f0d1f136f4a91e3dc651419b7456da909263464d4d641b79
font_02_sfnt_off000119f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13209 17104 bytes
SHA-256: 558b985fec7f44c112cea4eaea65a2325b4a4d17e71e24acf349886562b499d1

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