Malicious PDF — malware analysis report

Static analysis result for SHA-256 d629eab514514c3a…

MALICIOUS

PDF

81.0 KB Created: 2021-09-22 11:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5a27b5374d032ae47bcad1833e858d84 SHA-1: 8f8d6e01d211df7887325f8ec3995037ac813cdc SHA-256: d629eab514514c3aaf9391d32bc74b7247ab4b7168faf953f815e506fbe90c9c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to function as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution disguised as software downloads. The embedded JavaScript is likely used to facilitate the redirection or download process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=nba+2k20+apk+free+download+pc PDF link annotation
    • http://mevlanaasm.com/resimler/files/17679634213.pdfIn PDF document text
    • http://aburobocon2019.mnb.mn/uploads/files/67907866930.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021091101424891.pdfIn PDF document text
    • http://xn--80adic7alej3d.xn--p1ai/userfiles/file/purenomumu.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/2tv93dpcuoiegltbmpsbtjilel/47042256028.pdfIn PDF document text
    • http://93564497.com/userfiles/kuvogigomopalugugovuvega.pdfIn PDF document text
    • https://farsiherbal.com/cache/fck_files/file/xuwupekuxelak.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///12123436105.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/nogijabetebiruk.pdfIn PDF document text
    • http://sobateracota.ro/mm/file/lelufifosuza.pdfIn PDF document text
    • http://www.como-grup.ro/fisiere/file/74316206209.pdfIn PDF document text
    • https://maychieuvinh.vn/upload/files/lexiveju.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/lidikodameluvuvakoli.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/tejarivagumuvapazorenuf.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/joneguri.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/29952298542.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/kulepojo.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/71570233221.pdfIn PDF document text
    • http://azs-szermierka.pl/zdjecia/fck/file/81661846711.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/2109140917008606166o5f3.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_off0000d3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D4 19100 bytes
SHA-256: 8732ace366d537484ce77dc6fe88bece896649024dafa798184eebabb3677848
font_01_sfnt_off000105c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE0 10792 bytes
SHA-256: 4734d699890a45f7618b1a081f4fe92b0863459becf299fc6e1220e584e18fd1