Malicious PDF — malware analysis report

Static analysis result for SHA-256 948a191446d268af…

MALICIOUS

PDF

75.5 KB Created: 2021-09-20 04:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: f5a332714dce89ae40e0559c20cb6c6c SHA-1: 99a9460b2893e689e49a3a97221802b24110a110 SHA-256: 948a191446d268afbdb91bde58f59c1cc68df85db0195708274f2582f718e6ff
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs, some hosted on potentially compromised or disposable domains. The presence of numerous links, including those pointing to compromised CMS uploads and disposable hosting, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://10glazsikeyrosa.ru/file/52879473509.pdf In PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/jodisekubirixotejaw.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/89687209488.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d943045aea---34339172174.pdfIn PDF document text
    • http://industrialdevices.in/uploads/motaferika.pdfIn PDF document text
    • http://tg-focus.ru/userfiles/files/35715831383.pdfIn PDF document text
    • https://maintogelonline.bet/contents/files/defisawofiwexolapugiti.pdfIn PDF document text
    • https://tsegypt.com/file/86762404329.pdfIn PDF document text
    • http://riph.pl/userfiles/file/3795960207.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210920055239.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/48364192542.pdfIn PDF document text
    • http://associatedreclaimed.reclaimedoils.com/userfiles/files/64353339275.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161330d023ec60---pikomutif.pdfIn PDF document text
    • http://dpsnowodworze.pl/userfiles/file/nokaziworo.pdfIn PDF document text
    • https://phr4u.com/files/vulipigutedafunabutital.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/80048915823.pdfIn PDF document text
    • https://eagle-aviation.com/userfiles/files/jagezadawonavu.pdfIn PDF document text
    • https://tepihtrava.rs/files/54197131670.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/3bb0fbfc9a100b93ec591d6b6969a188/85456978307.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140542302cae---92168498963.pdfIn PDF document text
    • http://holzbau-napetschnig.at/35899280370.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/pepixubufanikuxawipa.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/kixenaxixeginirutowe.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/wokefe.pdfIn PDF document text
    • https://hgb.se/filer/file/30220948309.pdfIn PDF document text
    • http://llux.vn/uploads/files/57198874175.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=ggo+football+official+game+free+downloadPDF 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_off0000c532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC532 10916 bytes
SHA-256: 05858358046f760d6aa116d38826e5a7107e7b6940bd0214bae015991edf1b3c
font_01_sfnt_off0000de58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE58 16248 bytes
SHA-256: d3a50a0946be98012bef06cd50f63b822e08dcf8757ef759ace5df9bf1c5decd
font_02_sfnt_off000107fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1