Malicious PDF — malware analysis report

Static analysis result for SHA-256 14944ee45b8b6c52…

MALICIOUS

PDF

87.7 KB Created: 2021-08-15 18:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: df4ec23d4093d1fc38669662484bdf46 SHA-1: fd1b69df33bf32d73dc7ed857f4b885d827178e0 SHA-256: 14944ee45b8b6c5213f37dd6f13c1d63e607612fda10bd62beeaf4b485b3f881
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised or disposable hosting, indicative of a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • 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://huntic.ru/uplcv?utm_term=does+sea+of+thieves+work+on+mac PDF link annotation
    • https://citytrafik.nu/images/file/ludenapelajinopo.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/bc1a906732f5bbb5138f8111b2e93e34/1006386384.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7485149d8---17492472614.pdfIn PDF document text
    • http://kozelsk-adm.ru/files/uploads/files/monigonapona.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/fonewurowe.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/tojunanoxopuxased.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/97749631994.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/38117600968.pdfIn PDF document text
    • https://stabiactiv.com/userfiles/file/68797667991.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/46137517090.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/is7amk9h24b55g5th0vi3hhfl5/wopekimazaduziveleko.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/24452908361.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/xusasesaloximepep.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/97381786478.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/541938bd15020e1af32b50f2575415b7/86979186052.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/k3rpg9eklhk76au6k24ff8tloo/rewikewiwiwapujelataxij.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/94032841298.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe30939f655---sejidobozekezowexul.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/211133952.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ccfda3b272e---36701299024.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9e29ebbc35a8e3b66e5f893a16a35153/ferijelulabaruga.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/gutulejufejiva.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/df91d5cfb6cd0ab4c950a2c117cd2536/68424553576.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_off0000e9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AF 10800 bytes
SHA-256: ceb49197b010112ac23351e2dc8d3ce98a546566cfd211ca08cbfa44a4fbb7b5
font_01_sfnt_off0001027a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027A 20332 bytes
SHA-256: 809d458939aba157a0c0fc0a8c59255f1b4dc7b4c1aefc0c362e97070ff71e0e
font_02_sfnt_off00013750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13750 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1