Malicious PDF — malware analysis report

Static analysis result for SHA-256 071e0194ff619cc6…

MALICIOUS

PDF

76.1 KB Created: 2021-09-10 20:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bed43be53b4a440750fdc0068bfd1bc5 SHA-1: 43652885f68056655bdaf56893be8b6d19888ff6 SHA-256: 071e0194ff619cc66e29a224d50ea412d7428981344f79831ce06544e54109e8
126 Risk Score

Malware Insights

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

The sample was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The PDF structure and numerous links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://girl0229960192.com/upload/users/files/50584103499.pdf In PDF document text
    • http://imobilestore.de/userfiles/file/73454718097.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/84617631287.pdfIn PDF document text
    • https://mjrspot.com/fckimages/file/mewilewumeko.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/161399b9b8c753---neluxopimafa.pdfIn PDF document text
    • http://web-news.eu/www/pkpar/userfiles/file/43284869746.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/felarumimigogukusinenunus.pdfIn PDF document text
    • http://traiteurluc.com/userfiles/file/84996291133.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/tunod.pdfIn PDF document text
    • http://hunicorn.hu/userfiles/file/jinumabanobawajuv.pdfIn PDF document text
    • https://senesi-sklad.cz/userfiles/file/97206038672.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/99848561090.pdfIn PDF document text
    • http://xenangheli.vn/public/files/gibatiwitulazakedefawaw.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/gifamokipanobixa.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/gekixefef.pdfIn PDF document text
    • https://biocenfis.es/uploads/assets/file/67028912923.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/pubodivexuwojo.pdfIn PDF document text
    • http://cudicio.it/images/file/98547587655.pdfIn PDF document text
    • http://vhshf.de/File/77513639352.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/60281792506.pdfIn PDF document text
    • https://koratspring.com/upload/file/91689109229.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/67683995282.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/8a89fc89b43b8e2c81fffa8724592b9b/45790169175.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/sazofimowa.pdfIn PDF document text
    • http://marisqueandopremios.com/campannas/file/wuvefelefope.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+fix+play+store+not+downloadingPDF link annotation
    • 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_off0000c4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D4 17128 bytes
SHA-256: 38c2f43d7f58af04d6640de30c5dabf3c28923df0854eacd1dc0c478a0b6f94d
font_01_sfnt_off0000f0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F0 10964 bytes
SHA-256: b19c57d42a362bf081a47bc51c4fd7fd759bc76a104ef6fc14ca2a6a9e2e30ff