Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b010dbabc0a61ee…

MALICIOUS

PDF

92.4 KB Created: 2021-08-10 03:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cc3d715f1459a684adfaa816de2262cc SHA-1: 4867d7abc037a5837c8c45c82b63b775d513edb9 SHA-256: 8b010dbabc0a61ee620893d75d3cba9f6944c6d95cf6fe3ab6f6d312fc924cca
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for a link farm, and the presence of 'utm_term' parameters suggests a phishing or SEO manipulation attempt. ClamAV detection and ML classification further support its malicious nature, likely serving as a lure to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://smidgel.ru/uplcv?utm_term=tamil+mobile+movies+2021+download+tamilrockers PDF link annotation
    • http://anhbanglaw.com/userfiles/file/tomadaroxib.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/zogasenesadexes.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cc52adcb118---sowojikidilelakixadijisen.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/93040729957.pdfIn PDF document text
    • http://darec.sk/files/files/28009329755.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/17304989613.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16093370316e70---tukidete.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/55500837148.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/91675439147.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160becbbe1723c---tazebedugadimabetezegem.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/jaxapoduzafus.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/u5kpn4go6bbht0m06aibnbpfn1/50437549706.pdfIn PDF document text
    • http://membranekeyboard.pl/_data/file/fikolupozukogavok.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/15647467341.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/fuzukozopololavo.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/biwuzuzokigubivafiwalid.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/31095663949.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cbd7eccc7cc---vejelidijivorujatilaviwoz.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a5928b5a6---webekagivevokogogimujaxo.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/vusasaneginijetenilozokap.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202108010722221612.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_off0001034f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034F 11172 bytes
SHA-256: d3661b44728113488f512f7b0c4bcc2b03494b85525f633fd197453e57b91b87
font_01_sfnt_off00011d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8F 17516 bytes
SHA-256: 86a903eb17d948c94ea22a03c80646846ae9c6d7cb93d83bb7914bc51945cac4
font_02_sfnt_off00014b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1