Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aebe3e0b207f99d…

MALICIOUS

PDF

74.2 KB Created: 2021-09-17 01:37:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dd95b6e435bb0262d9e9d8cf29f4673a SHA-1: 66662c2c6b7f22fe31ef1244aad00e7e7e1f8f4e SHA-256: 2aebe3e0b207f99d1e91652ab14206c8de08900f9d6f5fbad3a8fb72b35b11f2
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are hosted on disposable domains or point to IP addresses, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cructi.ru/uplcv?utm_term=kick+the+buddy+mod+hack+apk PDF link annotation
    • http://bdnchem.com/upload/files/69861395209.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/bimepelujulibomabosutones.pdfIn PDF document text
    • https://limberhurstgallery.com/imageuploads/file/9560028790.pdfIn PDF document text
    • http://kaies.cn/upfiles/210912224101414579hk4859.pdfIn PDF document text
    • http://kerekesvillszer.hu/UserFiles/file/sumuponibetanuxasikarunim.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/xixopowa.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/tekokoreninevolukev.pdfIn PDF document text
    • http://talcmanagement.com/uploaded_files/userfiles/files/bagumejepizezapunip.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/turetanapasuwip.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612faa5f6baa0---nutixev.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/28969657544.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/menupuxekutufureme.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/c10d593719e7a5db114cae4cb8b2ae2e/zameketogagivuvinujezuzo.pdfIn PDF document text
    • https://webmenuplus.com/images/file/luxikaxokot.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/76958822880.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/57868335147.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/vegukexaxireteduvos.pdfPDF link annotation
    • http://flapboxes.custompackageboxes.com/userfiles/files/60773990843.pdfIn PDF document text
    • http://samtle.net/ckupload/files/wobatalularazijuwumasiku.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///19340491707.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/larirojarimoragodol.pdfIn PDF document text
    • http://lagerunda.it/public/upload/file/205865960.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210905035408_cv3fuf.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_off0000bef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF5 17000 bytes
SHA-256: 8fb036c7b1336ba15721f2bfda1a66310033cba6d8dabc5cd1917306beeb7c7a
font_01_sfnt_off0000ea74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA74 10796 bytes
SHA-256: aeb532620702f517e055e24f534553d11844e6260be9bf1f11459ae25850ba0f
font_02_sfnt_off00010325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10325 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1