Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f10624bd8e902c9…

MALICIOUS

PDF

87.7 KB Created: 2021-07-08 07:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4ac332dbbd17e6555c1e1af898eb9be2 SHA-1: 16c313a2e2c274b4879e201351c6e62e98f84041 SHA-256: 1f10624bd8e902c989be8f693ce8a8ae2b3d993f2472a0f359e62d036107c2dc
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pixomot.ru/uplcv?utm_term=nested+while+loop+in+r PDF link annotation
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0e207d87a---sodosu.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb4f5df72c---xezeraji.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/29624009893.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f68ee7dc1838c665d7197da28c2dfbb6/sirej.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/1518c35491afe759bac2298ddcff022b/68388473902.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/209afe4a685b95ea90e5bbdba9abbd5f/wonope.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/ca1e5156c5ed41b356ad3e3bb4b455af/56354566616.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e0356e0c260---dowotivepib.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/jibososatolasifugubuzu.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210630_285BAF0005C4825C.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/74bgtoa1sp26hq2v4niphdi576/jiwibizolubitulimu.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/31630822201.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/ph2ebi8sml722f6hvgnqd7ovd1/97378007513.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085824314136---kovotewuvek.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/sonosisetorizodu.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/31974791904.pdfIn PDF document text
    • https://kuepancong.com/contents//files/45583179589.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/ab3de5fb88cbb3e236afbcfdc9eebf78/7390758759.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/m21aja2msfrvu4omq4l81vk6s4/99032610895.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/20301528238.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/85684106342.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160858fea8eab6---2858295687.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/gijezaluvazowebajuvok.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/17613324412.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/13066671979.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_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 10388 bytes
SHA-256: d8f475553a40810930d236fdb0bbed72ee09b4206b52aa6985570c0b1a642e3c
font_01_sfnt_off00010ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB7 17808 bytes
SHA-256: 80d818c67cc4012ef959abef88929b13ed984d93b0e00b4e655dc2a378625c3e
font_02_sfnt_off0001395a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1395A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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