Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde467779cb5bb52…

MALICIOUS

PDF

87.6 KB Created: 2021-09-17 11:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b08f9e4c158aa66e1e2e60877b83a8c9 SHA-1: fece6798931d3adce184060fd2a9c926a5a7ff3c SHA-256: fde467779cb5bb5240d6f78b944648aa55e817ce607cd5bd977484589f7aa7cf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and multiple external URIs, many of which are part of a link farm hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cartopack.be/Images/file/90075752647.pdf In PDF document text
    • https://hophamthaibinh.com/upload/files/80337176342.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/31420943611.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/78571236471.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/todiripojinanukorekiwaji.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/35783350367.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/fafisorutamibirulefa.pdfIn PDF document text
    • http://nuklearmedizin-amro.de/userfiles/file/joxemosetalarogunopelana.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/89282006327.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210908070756_kgnk64.pdfIn PDF document text
    • http://www.siposferenc.hu/html/28331105276.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/8424491190.pdfIn PDF document text
    • http://frankifoto.com/uploads/pages/files/difojaluk.pdfIn PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/79761434102.pdfIn PDF document text
    • http://travellerisland.com/files/95666085468.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ee737e3d04d5a0b7853d52735a16e0ab/14563343146.pdfIn PDF document text
    • https://csodamalom.hu/files/files/levosolodipebukubixutunin.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/megovada.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/85935366.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/81976257352.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/9eblkov66kfvm902pv7cven7fo/40510438796.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/91647208665.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161334381d2a2f---derixogo.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/65059971179.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/88568080270.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=deadpool+telugu+full+moviePDF 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_off0000e819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE819 10636 bytes
SHA-256: 774be2a9a607ade8495f37fcde341eead33947b0f8b7ca8195ec675903e9719e
font_01_sfnt_off00010040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10040 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11852 21616 bytes
SHA-256: fe262ad74ff04ff984f3d6b3de9ddc66a37447d2bf731a3eaf8d4406a4e34f56

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