Malicious PDF — malware analysis report

Static analysis result for SHA-256 e472c51f493180f9…

MALICIOUS

PDF

80.6 KB Created: 2021-07-03 14:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea40521dd5a12fa9becf58c9748ce48f SHA-1: 2ab50c311a40f9189b419ee9a611554d3f17923f SHA-256: e472c51f493180f954e5251c59d5061220fc638579ce256a2b7de5e024e31e03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to its phishing or trojan-like characteristics. The document body was unreadable, but the heuristic findings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • 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 http://hanasushipickup.com/uploads/files/rijalogodenomesipoju.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e32ddc3dd---zupijetimatidugujevi.pdf
    • http://videofilm-tv.ru/content/File/juponepirukeraxiluxiwa.pdf
    • http://designbeginnings.com/upload/file/kixexuzopupejamerosuje.pdf
    • http://vizugy.hu/uploads/files/texudizoturege.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d84325e197---25652665717.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f4a3eddef---96394439718.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/8ecae21af91f750bf1070f375e62ef38/85804310669.pdf
    • http://jedwines.com/cmsCart//upload/file/mafaxigo.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea09b55e77---fibepakifusisexusurima.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/b21a9bbc0ef82640453ab86c3107b712/fetatuzivivegagewuw.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/3d59cf9ea966141120c9d677eafb1265/22748238874.pdf
    • https://jamuiboe.com/webroot/upload_media/60521583313.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea341ae85d---lumazinila.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5700e993d2---77306613681.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607a811e830a0---tidizor.pdf
    • http://tano-cable.com/d/files/rolekepevukewakijiwiwa.pdf
    • http://agcslohian.com/userfiles/file/temokewaze.pdf
    • http://pobierzplik.pl/uploads/files/jewusat.pdf
    • https://maturana.cl/upload/file/zinit.pdf
    • http://quangcaosms.org/media/ftp/file/xosopulebuk.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160ae16e7ea8d9---lomusukamukawosujuxugezim.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/f7a1dcd8a715f609cecc60c4dcb0579c/fipavazovisanopulifulif.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=wbbse+physical+science+book
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d73b.bin
0f1e069390f460372b33d199dee51ea84241b5fa19e6f4c4906a83ec6dc34f25
pdf-font-stream PDF embedded font (sfnt) at offset 0xD73B 10612 bytes
font_01_sfnt_off0000ef3d.bin
19f28961a7c2ab3f8c9345d31cb1e452759c1e2bba9c492aad7a7a2cc26d0cb5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3D 16904 bytes
font_02_sfnt_off00011b6a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6A 16792 bytes