Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc036179f89257a…

MALICIOUS

PDF

87.1 KB Created: 2021-07-02 16:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 418efc3726de93af814eb63f13162cc6 SHA-1: 63937b03a713e5bd18794e5e9e79631e4c7b54c0 SHA-256: 1fc036179f89257a8ea303e9841f668c80ff23f02984812c192339e5c3c6bdff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The PDF structure and embedded links indicate a likely phishing or malware distribution attempt, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://hanlacsclub.com/ckupload/files/vasufodewejigubibovefira.pdf In PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784074d7989---wetifemamutox.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/jibobaxedibukumedudirasex.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/vqu04167c6v53q6021ccnni2c2/polikejanuwononukuxer.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/90516484553.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/rasiwikegudusowilu.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/47d89fce952a777494843b78957655b1/77352899165.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160759b16c836f---40681000963.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7592399376---61590819668.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/q5485m054416r44ckgpvh42mbj/72063095005.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/b615idiiv4oggo0viqjurdhdb0/90722129534.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/8b37eb46cf88df401a162f7a080209d5/30073519538.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/loq8o0hp3ie3our57a8qmpvjvk/96521108975.pdfIn PDF document text
    • http://vodnik48.ru/content/file/bapagolip.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/62919806616.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1234274e1---19776308387.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d5b3a4193---ronemaxasadepujeposowin.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607207ad7f86a---zanikamirizesapo.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/32370786987.pdfIn PDF document text
    • https://digireg.it/upload/lumorunelojoparozorase.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093bc2edab71---wezasibusatowosoj.pdfIn PDF document text
    • http://valleypainclinic.org/userfiles/file/9031568226.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=the+telegraph+crossword+answersPDF 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_off0000f02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02D 10748 bytes
SHA-256: 9d1856c6cec0d3441f4af3783d821316824d4604af4d6b1dd6375474a3cef23c
font_01_sfnt_off000108c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D8 17680 bytes
SHA-256: 569011c05494505eebfa64823d8118a1044d64de6b8d1c1b51e516f8b0aa4743

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