Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a46815adeb915d…

MALICIOUS

PDF

72.2 KB Created: 2021-09-12 06:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 84c575f1fda6b596fd283c093a6da83b SHA-1: 483417c943af0c65302a049e5bc9b7c7eaeadae1 SHA-256: 60a46815adeb915d1c223af916cc44e37a5601b78eb4212b23bbbcad5b54344c
196 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-severity PDF_RANDOM_URL_LINK and ML_NYX_PDF_MALICIOUS. It contains a large number of embedded URLs pointing to external PDF files, many hosted on compromised CMS uploads or disposable domains. This suggests a phishing or malware distribution attempt, likely using the embedded links as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 https://oniceh.ru/uplcv?utm_term=rc+flight+simulator+mod+apk PDF link annotation
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/zoliwizavizukojodoxad.pdfIn PDF document text
    • http://schokozentrale.de/idata/jedoberavifol.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/jevofela.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/59107210843.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/rugelimuk.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/94995167122.pdfIn PDF document text
    • http://expertworker.paraleumarian.ro/app/webroot/files/userfiles/files/94131145990.pdfIn PDF document text
    • https://purmoradiatoriai.lt/images/files/winabiterinefoxun.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac87cc2183---26356406728.pdfIn PDF document text
    • http://jayeonrak.com/upfile_editor/2021/files/45260328452.pdfIn PDF document text
    • https://kamionosnyelvlecke.hu/userfiles/file/2758906216.pdfIn PDF document text
    • http://itcbeautytrainingschool.com/userfiles/file/lutofaduretelojaxakulol.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/wefotujaziboru.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/007690e69968a5556314bb28a379603c/xepadut.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/13139763929.pdfIn PDF document text
    • http://hanifeugur.com/image/files/95952781532.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/74583694711.pdfIn PDF document text
    • https://panelshock.com/userfiles/file/wakaw.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/lowekisirorebigogegel.pdfIn PDF document text
    • http://funagamex.vn/PhuongNamGroup/userfiles/files/mupojufuzikuxi.pdfIn PDF document text
    • http://ambulatorioveterinariobubiniregini.eu/userfiles/files/64680237892.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/zufitemum.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/mejupuruxeded.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/c29c5f66fcd56c72a8a26abda90bed83/72947604577.pdfIn PDF document text
    • http://ambulatorioveterinariosantanna.eu/userfiles/files/beguxowotigovafopekanojox.pdfIn PDF document text
    • 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_off0000b7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD4 11068 bytes
SHA-256: 38bf5ec00087d1a526b0734dcca6cf242f6e7e1f1cba951fdfb63bcc724c960f
font_02_sfnt_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 16176 bytes
SHA-256: b2f4410814d5d8f2ee85d6c05726db833b9d0830dd874352c696b3801b9a2bc4

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