Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc7950dfa315656…

MALICIOUS

PDF

100.8 KB Created: 2021-07-09 02:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 477cec975a86370c1b9bd802c55460e8 SHA-1: ff393c8e3745f84818f2a4ad191d7dab410f5f38 SHA-256: 4cc7950dfa315656889936528cbd9cdefc7e5838cf742b34306113c0036fdac1
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites and a heuristic indicating a fake download button lure. The presence of these elements suggests the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9757

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.hippocratio.gr/ckfinder/userfiles/files/7434977878.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8fd2dd2b7---wekixemivuripime.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/34f07989a0fa3461829ce7783d21ca45/54965908237.pdf
    • https://equinox-e.com/upload/files/58495774396.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2d127dfb8---52267460367.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/e73v7ci43g38orotoonj0djid2/jejebinu.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cb41abb535f---zomotuwirikegexuji.pdf
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/93477852439.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/2469eb3319ae045390848ebe79b48811/voxikefimaworumaj.pdf
    • http://zoldjogsi.hu/uploads/files/paxen.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d23ee2b96b---88999171435.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/65a7acd2b0afc070d06c176a73e9b5f6/10812789812.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/e867fcd0e0247f6d69e0d2723628c01b/83549866892.pdf
    • https://abe-rdc.com/userfiles/file/kitufe.pdf
    • https://mimpiindah1.com/contents//files/rujovewazuw.pdf
    • http://btc-ltd.com/upload/file/salop.pdf
    • https://hr-serdahel.hu/images/file/63063404876.pdf
    • http://nicenpos.com/userData/board/file/54757897905.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a62fc6696---waviwivam.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/vd73oj8i3dk4p0fi65ag236bcp/doradelojo.pdf
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/61215138928.pdf
    • http://asja-doll.ru/userfiles/file/mugikelusaduredaposo.pdf
    • https://www.carrentchiengmai.com/files/rabofanaduzazasew.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=no+recoil+hack+for+pubg+mobile
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f738.bin
0cac7f6124162daf564bb7949563a17ee811fe5ca87f307bfb9c685adb31a43b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF738 10868 bytes
font_01_sfnt_off0001100a.bin
4d323bb249e88c398f0095f889563dfd8dc5db968c63eff0834307f32c320b32
pdf-font-stream PDF embedded font (sfnt) at offset 0x1100A 16172 bytes
font_02_sfnt_off00012589.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12589 16792 bytes
font_03_sfnt_off00013d96.bin
3f5b003cbbab92eb14d52575c44305a4869e7bf0dc4243fdff0d451c124a8092
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D96 3060 bytes
font_04_sfnt_off000149fc.bin
ec59eb66a05791b668fab14320c421378333708d3abe81e6cdf0d074b729276f
pdf-font-stream PDF embedded font (sfnt) at offset 0x149FC 24588 bytes