Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae80fe3b89577dd0…

MALICIOUS

PDF

68.9 KB Created: 2021-09-27 04:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1b63460887037081780aa00bb50f8475 SHA-1: fc1d5d094752bc2b266116e4a326015c2d483f67 SHA-256: ae80fe3b89577dd05f6a348f742d6fc9003e8c2831cedac6a0d9fe918c7f59d9
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://huntic.ru/uplcv?utm_term=clone+wars+putlocker PDF link annotation
    • http://kronospan-mofa-hungary.hu/editor_up/vaguxanazofijotiwonavape.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/17528135174.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/duvamukusononasu.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/robufedutanezoxuzaka.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/pilodadaganu.pdfIn PDF document text
    • http://sake-tori.com/images/library/File/76210424736.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3b8233d02---6077530508.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/zukemaxowato.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/42791631690.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613961a1cc93e---25418198106.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614f284514c31---gavoredukibozoxone.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/9977c15ba01c94b0b43e6618733cba63/10361124779.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/io1tpsrfdrml27s6m042asjs0i/fumeronifomi.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/55383777239.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/gukumufexaranimegad.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/xobuz.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/65400031024.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/miloxagojereboromifolibu.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/98562099674.pdfIn PDF document text
    • http://mycoapaisyl.com/webimages/files/74211441708.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/f92c4be752819ed5c7a7a6a1f7a7800a/gekupevasanumujupopilel.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109041145061648.pdfIn PDF document text
    • http://suliaox.com/v15/Upload/file/202198831434639.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_off0000aef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF0 10584 bytes
SHA-256: 34af2eae71849145ebe6331ecf9e3813c18a3bd647ffd556292a2bc519de5d6c
font_01_sfnt_off0000c768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC768 15400 bytes
SHA-256: fa7b00af409126862d1aa511dd841c5dc8c6397c89688354d1563e14e1077f8c
font_02_sfnt_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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