Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2665d38e8325a1e…

MALICIOUS

PDF

79.4 KB Created: 2021-09-19 22:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 56b81ec199c159e75bc85911fb7bf9ec SHA-1: 388d8008bce774fcbda69f783dc9a4eab6413870 SHA-256: f2665d38e8325a1eb683cb8ef7fc3b8ee54669c419fe4264fb13655bb78b2977
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common attack pattern for delivering malicious content or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/uplcv?utm_term=naxeex+superhero+mod+apk+android+1 PDF link annotation
    • http://mvpbuilding.com/userfiles/file/jogajijemagamamozarurego.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/42038813349.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/rokikogogasa.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/d9d92f1e864f2e8ff000e5446eeacf60/68003091123.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/lerovapinevasab.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/65724787954.pdfIn PDF document text
    • http://tencanpowder.com/d/files/69797134390.pdfIn PDF document text
    • https://electrodomesticaruano.com/images/ckfinder/files/fifupime.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/sixusetegigakasikov.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/majopagolejidixafa.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210905172414.pdfIn PDF document text
    • http://giaydantuongphongkhach.net/images/news/file/bedesog.pdfIn PDF document text
    • http://446888.top/userfiles/file/maxexenek.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16143fb62d7930---37171496985.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/18615735110.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/mumakurinaluloxif.pdfIn PDF document text
    • http://xn--c1aejbdnke.xn--p1ai/admin/ckfinder/userfiles/files/buvifaj.pdfIn PDF document text
    • https://cuatudongbinhduong.net/uploads/files/mejabagefoxuximemusunitik.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/vadijofuwunenadulaz.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/mofudibenosatetab.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/bujarotivagevupinuj.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_off0000d1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BF 10836 bytes
SHA-256: 862babbc400c9fdd9ee67fe876af4455290a30550c4634cd1fbf6daf16e7d486
font_02_sfnt_off00010299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10299 17428 bytes
SHA-256: 4d5547dc5ba10c49613e6f8a77c2b7662494d73310f07265cddfd6cf0eabe56a

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