Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a22efcde7a270e9…

MALICIOUS

PDF

94.4 KB Created: 2021-07-21 00:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a08fe771701adfac9a803f163c132d3a SHA-1: fc78636b29cbe09e79633f9daa4290e4ccdbd135 SHA-256: 3a22efcde7a270e9edd168452bd60abddaa3f023e4cb4036cbaae4aa24bb1d26
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external URLs, many of which are hosted on domains that appear to be compromised or disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or distribute malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://ijtm.in/userfiles/file/94726805193.pdf In PDF document text
    • https://mollis.rs//files/67761610813.pdfIn PDF document text
    • http://goldmustang.ru/files/files/32061349359.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e63653897---kepasaporepidodofem.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/90836218083.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a370663a752---dijajipalibulavumenidowo.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c979262efe4---zosexadizowajafumevirajub.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c088712ce---mefanexatajija.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7cd98a738---pewigef.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/dojopajojaf.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/gaduva.pdfIn PDF document text
    • http://facyt.com.ar/ckfinder/userfiles/files/44977443172.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/ba153422ac0d6d1411e974a659a4af6a/68944598210.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606eca8f7de19---98602418072.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/5334547343.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf057b5d43f---54406656623.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/92041457156.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/67802046826.pdfIn PDF document text
    • http://mesahighclassof64.com/clients/874441/File/dumedawufibeximaliful.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/o927o46ajkvj9fnfaaaoccbh8v/79834657258.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d067f8d252e---67323178070.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/kogopinoganuzutulesova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=kanji+dictionary+for+foreigners+learning+japanese+2500+pdf+downloadPDF 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_off0000e8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C1 11492 bytes
SHA-256: 876e19729e6b1eec8c313e38cc96f0ce7eea087a9ee9e49c854e5cbabadb4907
font_01_sfnt_off000103f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F6 6728 bytes
SHA-256: 5d9260cb7f48b7dd8fef8829d19744fd95b3f77881cb3691cde05a9ca176a48b
font_02_sfnt_off00011b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B50 22240 bytes
SHA-256: 91ce1390888a7d6a8fd78ed25b15b912614594d7b962c901eadf1559a460b59b
font_03_sfnt_off0001510a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1510A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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