Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabb606f047fcb99…

MALICIOUS

PDF

67.9 KB Created: 2021-09-25 01:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: eecc58dbf049423d29b0bb52fa96e91a SHA-1: 71d251f9c650862454a6a9b8cec36dba8e389fb2 SHA-256: fabb606f047fcb992dc6df135d94096ff20b1574dd854f8ab6474dfb1694d240
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable link, a common tactic for delivering malicious content. ClamAV detection and ML classification confirm its malicious nature. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially malicious websites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://kunmobile.vn/files/uploaded/20210913/file/47519856774.pdf In PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/83111230657.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/puluzojijekumas.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/73800219297.pdfIn PDF document text
    • https://zmiz.hr/userfiles/file/tugamu.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/84319817243.pdfIn PDF document text
    • http://xn--76-6kca8aqc6c.xn--p1ai/pic/userfile/joregavozajexawu.pdfIn PDF document text
    • http://serenetour.com/image/upload/File/xutatixagupokujavid.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/22114594516.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/tuwirevipelofatuwa.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614715c6c60dc---nifitepup.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/1j4fplv0eccfjbl224ca6ulaaj/61955138518.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/71414208158.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/pimanaloxeguvubisukopelo.pdfIn PDF document text
    • http://santabruna.cl/upload/file/paxatofakuzeterojadumuwu.pdfIn PDF document text
    • http://tochuchoinghi.org/files/jadubafewaxotamagopiresi.pdfIn PDF document text
    • http://pmke.cz/pictures/files/22992249272.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/521743134.pdfIn PDF document text
    • http://gidromall.ru/img/uploads/file/xokiv.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/datafetuferotaxefebejed.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/26695843455.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/furibudek.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/62095479337.pdfIn PDF document text
    • http://hoangnampte.vn/quangbasanpham/app/webroot/upload/image/files/rupapuxifolew.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/51636058155.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=prey+android+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_off0000af15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF15 14404 bytes
SHA-256: e6633c253c7b5f60923a9bb63f77bf4429d0cee24b169ab9581c043e11ed942f
font_01_sfnt_off0000d32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB44 10176 bytes
SHA-256: d94432c1960bc60fbcf9e84f09bc20538e6d6c831a1f5fb84afa8813fec0207b