Malicious PDF — malware analysis report

Static analysis result for SHA-256 361bbab34abc8367…

MALICIOUS

PDF

98.0 KB Created: 2021-07-23 21:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 988c4effa298dccfdcade3de1bc4ec31 SHA-1: c2a5aebf1a3758b0fb4bc68353cfb1dee6a65a2f SHA-256: 361bbab34abc836717612641ed477fd8a8e82bf3f37b3153d4912caa588156a6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous external links, many pointing to compromised CMS upload directories and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it functions as a lure to external malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b4a61a8db---vititoranisabim.pdf In PDF document text
    • http://pulsarvn.com/media/ftp/file/87757556712.pdfIn PDF document text
    • http://distributoram.com/files/file/sejafan.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc93d57c56---36699297534.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/12630028993.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/sasomuxazegelebu.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/sazalasunenazebig.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/kibesidafurororezil.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608482f9ad1a1---14643922462.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/27207767619.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ba8d5e492---44116372537.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/533683616.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/3915428a0f45ac0f5360a8e2558f138d/80370067992.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/nurigujumugetusudumumagam.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/gakobowewawigemogogalebid.pdfIn PDF document text
    • http://axwelindia.com/uploads/gekavujux.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c73f9a02f76---94643479632.pdfIn PDF document text
    • https://actor-conseil.com/files/file/10953686371.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c54294d060b---52973686109.pdfPDF link annotation
    • https://dancleland.com/img/upload/file/tigoru.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f0679adaf---53082187366.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/76574976144.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/fujukakavazefe.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/18792756774.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/tuvajunegawowikaxuzu.pdfIn PDF document text
    • http://easternsheep.by/app/upload/file/98954334103.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=test+de+manejo+new+jersey+2020PDF 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_off000117e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFD 10804 bytes
SHA-256: fe6e64f2089e259e02d8a85b7c9a487e2b88e0b5d85033ec72c2953c71b4a4d1
font_02_sfnt_off00014914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14914 18276 bytes
SHA-256: 40f34b8ecb1e9c7b831af04ece4b3114dd90dbc55b2d0f19c903332a15598b12