Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07c09ff2faddb6a…

MALICIOUS

PDF

90.7 KB Created: 2021-09-04 06:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c69b5162451737e1f0398d4d819863ed SHA-1: 53e7785405256241f7d40ad89f898513cfd53c5d SHA-256: f07c09ff2faddb6adfe2e001befc6ea0968af03daa0e31eab18087b5a37a7b8b
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links, many hosted on compromised WordPress sites, which are indicative of a link farm used to distribute malicious content or conduct phishing. The presence of these links and the overall detection suggest an attempt to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a01937242e---55092683733.pdf In PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/kamigubunilibezamojuzegi.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0da015910a---kotavogixoxegibalo.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/ojg5h16lc7dpnp66q35rci7gi3/71205578327.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ca1ee45488---8983849146.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/nonulemuruniga.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/00eebe27510a9743950442c0de4c77eb/26148737108.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/74787017944.pdfIn PDF document text
    • https://harryfok.com/ckfinder/userfiles/files/41857953719.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/60872772e82b474c74a8fb0466a81e90/47797037929.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32bdb93447---punufuloxukoden.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5f6039c83---bexogoxopoda.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/jukilikemurefonutegef.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/pilurufafadimupusofudafu.pdfIn PDF document text
    • http://sam-global.info/files/file/nibafomup.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/25944694126.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/sigowolonupakalufiv.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/mirimujos.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/migibagitemewukevesojini.pdfIn PDF document text
    • https://istanajp.com/contents//files/39173215512.pdfIn PDF document text
    • http://vetcarefoundation.org/userfiles/file/mimuwemejafajurem.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/86678084679.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/32899705773.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=glow+worm+energy+18s+installation+manualPDF 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_off0000fb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB60 11048 bytes
SHA-256: bf0fbdc194ee584e25e34152bb8c2d3213f375cc0172a5dda438c783cf315658
font_01_sfnt_off00011540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11540 18384 bytes
SHA-256: cf0c5c846733b8ef06371da6daf279dda38df6bf404782131cb5fadd24a9fd2b
font_02_sfnt_off000144ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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