Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db1e11f922edcd2…

MALICIOUS

PDF

93.1 KB Created: 2021-09-08 01:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 419cbdc08ba996dd77dd8b15a3ea002e SHA-1: aef8fcf4bc09f2ec9494dc96a25107d52c20ae55 SHA-256: 2db1e11f922edcd2ded04a4e7c9785bd3c6c0ffeb27fc45ce295e7b7623d0fc8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. While no scripts were explicitly extracted, the nature of the links and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607ceb930c419---29910175555.pdf In PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/1c43fcbbc66720af2153d12ec699f387/weloputozagivujeguvo.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/kaviguriwa.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/26659941011.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/cd1a212a212dabdc71316d0b769c41c0/dobopaganasesine.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/ginigamufimotira.pdfIn PDF document text
    • http://dakmet.pl/upload/nevufixinawunokigaju.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/70502714385.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/gobujebokisukemogivunupov.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/59099378832.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/58956245881.pdfIn PDF document text
    • http://iteequipment.com/clients/65150/File/nibinejodewuwakodawa.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/06201b036e7a59981a316819f554e59e/sikisife.pdfIn PDF document text
    • https://rumputhijau.com/contents//files/suguxodijitoxijumitobob.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/lidarisitedavivosirejiwe.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16093064858622---nosobi.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/zixafurobugeb.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9849bf10be---lumolemebuwumo.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/6eda8dbb820b635db5fb2a5c476c6c8f/97631931206.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/paxizofumiwawaxisemonilab.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/7ad3f4af2ce0e65dca29db71ee9d59cf/momumapunajal.pdfIn PDF document text
    • https://datajournonepal.org/files/xugalaxelutexe.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/basukopawuxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=sap+qm+configuration+step+by+step+pdfPDF 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_off000100fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001190f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190F 19160 bytes
SHA-256: 1f89d2c8d15610ffd1846af7a67e5626a8567dc71f2b0028f34fc5a8ee1b9427
font_02_sfnt_off00014a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A9D 11492 bytes
SHA-256: c0b6fa98cc62f5771bd08cc0fcd7d0b4eee457fe89bd7ad71df37eccc3e91f43

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