Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bf150852a19723…

MALICIOUS

PDF

87.6 KB Created: 2021-09-09 12:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e44cd9e5443de5b1db029c9d285a42a3 SHA-1: abfe91e3416a43cb75b3ceadca666a7ae25f399e SHA-256: 46bf150852a1972358bf52558446092c028d9d1ee0de1350a421145d48668d0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as a phishing trojan by ClamAV and an ML classifier. It functions as a link farm, presenting numerous URLs that point to various domains, some of which are hosted on compromised CMS uploads. The primary purpose appears to be directing users to external sites, likely for phishing or malware distribution, rather than displaying meaningful document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://sziszolg.hu/editor_up/89853465935.pdf In PDF document text
    • https://arerp.kr/data/file///kosedizexivipobesixizawul.pdfIn PDF document text
    • https://haidangpc.com/contents/files/79287744594.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios/files/86334800388.pdfIn PDF document text
    • http://jrecchina.com/ckeditor/ckfinder/userfiles/files/tegavaxi.pdfIn PDF document text
    • http://melvin.cz/data/26563740488.pdfIn PDF document text
    • http://canavesiobruno-architetti.it/userfiles/files/memuxalipini.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/55323399388.pdfIn PDF document text
    • http://www.enfersalus.com/ckfinder/userfiles/files/60157232419.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/suvusegodenaluwivovoti.pdfIn PDF document text
    • http://trevorhannant.com/sogipowimeposozadu.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/c3a1a607cd224a0e696b81a89a63a874/2176692395.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16132610eba4c4---zifetagisoro.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/ragedew.pdfIn PDF document text
    • https://taumed.kz/upload/2021/09files/210902212446753510s071g.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210904_0C631CB55BF5D4DD.pdfIn PDF document text
    • http://kgmda.com/upload/files/26356020899.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/vemijafivagapimatagi.pdfIn PDF document text
    • http://mega-stainlesssteel.com/uploads/image/files/10433440551.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/47949256110.pdfIn PDF document text
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1630552432.pdfIn PDF document text
    • https://sindhuinvestment.com/ckfinder/userfiles/files/72394829129.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/18340409294.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/c02e8f256c3f4213a558abf5ccac1518/vodagasasazep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=criteria+for+borderline+personality+disorder+pdfPDF 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_off0000f04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04B 10776 bytes
SHA-256: c478050916433a2b6826c95b66f5bb9f65b66dd35b0d067df68339bea74d3fe4
font_01_sfnt_off00010905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10905 18428 bytes
SHA-256: cc2e0d1aa4279d93fb4fcbc29d78b9f464f9f67a37c288cb83fc1eab6a17b8fb
font_02_sfnt_off000138a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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