Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bec450b53a1c0bb…

MALICIOUS

PDF

82.4 KB Created: 2021-07-30 04:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2d87eaa8d9ef4561c0af4bd93da3504a SHA-1: e67f5491012a6a1016bb8b68ad617961f15d97c9 SHA-256: 8bec450b53a1c0bb967eb8d7b9a2383d5d7b29a850dabf844870484811e4dc2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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=facebook+messenger+download+for+blackberry+passport PDF link annotation
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/86f01575660a00a2d5ff7694f68de0b6/megulejiges.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8b0669b907ce9898e1fb0d750117d514/24607552104.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/9pbvou1kd8ij931b2i3irj55ta/dasodoleweporolulex.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/26ce6b08c6b28454791d24444a4c7abd/bijetavenupivimav.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/zubepifopesetovexibizawi.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/63889264532.pdfIn PDF document text
    • https://olterus.net/contents//files/28190923196.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070be144cca0---97523946202.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/tezulonofanegipavise.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160930f2d7da3d---49836709462.pdfIn PDF document text
    • http://kco.su/userfiles/file/52413636729.pdfIn PDF document text
    • http://weingut-suppan.at/files/55898967697.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/1801663f7d31b24df42b59c3845fb5ed/vobelinavujijoxipami.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/412e825948814ff60fbc3b97d849e1ef/roxokavavukozowerib.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/lijobisopotofuner.pdfIn PDF document text
    • https://promise-land.com/upload/file/32319114854.pdfIn PDF document text
    • https://strechybenesov.cz/content/naxarewaxuxoxed.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/0021c5424c59ce686df793bf4fe5760c/mizawa.pdfIn PDF document text
    • https://roc.mn/uploads/files/mazozugugajada.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/natiz.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/opnvk5gvsko6aq755lekjpvi22/bajubudopanut.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/6tqr8avvtmjthqcrguc3vmumg1/lamitezuwixepilotifaker.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_off0000de1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1C 11280 bytes
SHA-256: aa78ce8135a111130eb0fc757efca257c845a3d1df31149bb8d7181b78fe1183
font_01_sfnt_off0000f845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF845 16976 bytes
SHA-256: a5b1770b3011853ac17920334f53bc76813738ff0382fd31421886945b386df9
font_02_sfnt_off0001247d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.