Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c69e9c5f7505b7…

MALICIOUS

PDF

90.0 KB Created: 2021-08-11 00:11:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 9cdb57fbdd8627c735bfb1875e821435 SHA-1: 9d9f88e4f26273e90fc8531dec328b09f652df32 SHA-256: a0c69e9c5f7505b7d9eb1bd95c3863051bea8e44ab7aa77cf51d772539fe9b3b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution lure. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/504166216d1ee36005497496c9a5c46d/25840231558.pdf In PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/44899424898.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/18203108941.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c0d5c3b4d---sosiluvukavolanomubitel.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/rajenimamadevoxopi.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/ca210d1db93cb84b77b985968ee9972c/ludavodar.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/hua8362sq88b0lt3s80rc7r1dt/zekomim.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/7dbc111fd289c8e30908bf37efc74470/binasuwolaf.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91b2f26300---bogukoxezikofomuroda.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/gazekekanobinipaxat.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/gorasigitibi.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/bawotikatuza.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/1kuhhdguc6lqrl42jprs68ohcj/pivezalasofitizi.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/gixufori.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/12339760168.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/hqkv9jfpf28hm97ko67r70iar1/denukav.pdfIn PDF document text
    • http://dothi.info/images/files/finazaw.pdfIn PDF document text
    • https://sukaunited4d.vip/contents//files/68143435829.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e59390e98ae---25586107460.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/7966215381.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/7a9c2af41de355654becb9f8f91eee1b/rigasitesalem.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/fonejavowemusosisibases.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/02a49c098a8c4bdecfad3936b986f5b1/xesoxojamiroxik.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5e5546139c8358dd741a62f2fb7afa33/73222562774.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/82935543389.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zapugomofusona.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/vosanarosamudabifugugav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=sniper+assassin+5+mansion+walkthroughPDF 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_off0000f8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C1 11188 bytes
SHA-256: 274d50371d05a58c0e20f16a476415981878d6c36b40815d3040656decdd38da
font_02_sfnt_off00012ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD3 16984 bytes
SHA-256: ab23e219ffaa93a683bab9ac010f29e76fb5f5f0bed3dcd94c3096483914bf31