Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee172c9dc7874e31…

MALICIOUS

PDF

96.0 KB Created: 2021-06-30 23:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c2ecc06c9b52125bdfb34f652e8cd84b SHA-1: 77763297dc397d13ec160fd29dbf815258c1ef74 SHA-256: ee172c9dc7874e311dd4d1cf7a0c1145769987856423963b445d254ff58e21d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage or disposable hosting. The primary purpose appears to be directing users to malicious or phishing content via these embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://nextgt.eu/uploads/file/davufotebepa.pdf In PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/189c620147071ed98f0ed86143556b0e/kedevolakisipanegezaso.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/11223259419.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/datusovovigifisenibel.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/c5re24micatb385117r77vvkq5/muvubete.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/cpcf0uv1rpv508sv1c7r2231t7/sifureruxumaweledilax.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/bonaxan.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/polazodotigig.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/52859354822.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/15359514394.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/0599e1994fbc3528706b2119621a933c/zigubutemesixe.pdfIn PDF document text
    • http://marymo.ru/uploads/files/23273768364.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/jusosumifino.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f7510e584---18192730235.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/49400792746.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/de62434097aa832e334f381198bda9d0/16334100488.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700694de3a5---88212299942.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/edprc5h8pci0hlhm7hfvq4e2jv/mamikunorumegu.pdfIn PDF document text
    • http://blueyee.com/upload/file/1718130116.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/36e4fec91fb33a24a0380b7e1e8ffff3/gilidabamoz.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/c7b03441bbd8650a5a800c21a7747da1/31045930352.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089af975f53b---soniwipezigejax.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb646e7a65---buwixirebexamuxubodode.pdfIn PDF document text
    • https://lecapsuledigian.it/file/lefoboregosirow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=sex+and+the+city+project+free+tvPDF 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_off00010dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAD 10988 bytes
SHA-256: b84cfdbd5bcd4c836316d89c7aae954bcc848279dc1be402ab411dab6cfbbbc8
font_01_sfnt_off00012730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12730 19968 bytes
SHA-256: 8782ca392eebe957cd91147e34b6e8b8f7e6553bb229866d5e9ce09faf61cd2c
font_02_sfnt_off00015a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1