Malicious PDF — malware analysis report

Static analysis result for SHA-256 74985d58c3415267…

MALICIOUS

PDF

86.4 KB Created: 2021-06-25 19:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3826ec8b72ad10a9f444c7c490362d1c SHA-1: 186b0df263328821497f25bb569a960cb094133d SHA-256: 74985d58c3415267c74026f26dbf3f407a191d517c36e3b84abaa73148b52ce5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous compromised WordPress sites and disposable hosting domains, likely to distribute further malicious content or phish for credentials. No scripts were extracted, but the PDF structure itself facilitates redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 https://infrive.ru/uplcv?utm_term=book+of+history+class+8 PDF link annotation
    • http://ankurgroups.com/userfiles/file/31697915008.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607961760d113---wigijivovenojonituweradow.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/85268064876.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/bebusasetejefudatuna.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/loos7dsuimlbmk359moo80donr/69227596091.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb563871cc---mevumewoxotozifedawunigo.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/0lmf5bhvkkqd0n0nlhq99ssr15/fepaxodowobi.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/9ajmi5v16n23il6ocdjmfn6d94/33811358652.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/803ad4901e823f5add0ebe2b56d31ca9/fugivulatasowomujozipodi.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/gokarekabode.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93bf317e6c---78055520802.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b9baeb126---4267317424.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a142c89e9---17437246141.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/ab26f49f14916eba3e2decec806735b4/87345656935.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b64a1a2749---xawadopovexeko.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/c305fd914a55802697e45de465b573e7/bexinoso.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/70829031004.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/12991b75298bfb4f6ca2fc302813e985/riwuvaburu.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/2445481035.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/3737ba757a6b5a275c5a0189971997eb/sifodosawoja.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/kerijetama.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/mupolaxedapozoxatipuzed.pdfIn PDF document text
    • http://aquatherm-graz.at/files/77438858147.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075d19c6e8e4---56580569547.pdfIn PDF document text
    • http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/85745940229.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/54466487496.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_off0000f06b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF06B 16792 bytes
font_01_sfnt_off0001087d.bin
61294cc8082431ef08e9e02e28c25b2b49e7c9a154d020f7dd1ad8cfef7b7d66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 16660 bytes
font_02_sfnt_off000133a0.bin
c242dafd89809fa48ce4e4315b252b8f059785c7413ec149dfd6357e1927c440		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133A0 10664 bytes

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