Malicious PDF — malware analysis report

Static analysis result for SHA-256 084889651be49947…

MALICIOUS

PDF

86.9 KB Created: 2021-06-29 23:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6721d6606bfafb8cfc3bae77702afd5f SHA-1: c480600584873bdf3883cf7a97afa400df698729 SHA-256: 084889651be49947c4a7db5859f653c42e4c9373f30a105070c39c7ed17fd6ac
196 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan. Static analysis revealed numerous URLs embedded within the document, many of which point to compromised CMS upload directories or are hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of 'cmd' tokens in the document text suggests potential command execution, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://chptravel.ir/data/file/wuwusoxibikaveduxuwi.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/2d536f5964cccf9df488bca41d84e3f3/gapulugijaduze.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/t473772m2l28dn1l7hr275nuh9/voledafifonetewo.pdf
    • http://inse.us/uploads/images//files/36368032768.pdf
    • http://picassogift.com/Uploadfiles/files/vipebujajitito.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/6725fdc721c935ba51fe9af1bc7ff148/teragu.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c8f1d0f42---xuxoteporifibupavudagum.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1121caad7a---ledumegola.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdb482d9d8---27465399684.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/njj9k1m2dg1v0cmd3bk0enqlet/valovurenewa.pdf
    • http://euro-ex.net/images/blog//file/werirofolin.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/6e202b05551e52dafe043fbcb2768f80/davajuluzugakefim.pdf
    • http://xn--9w3b11kh5l.com/ckupload/files/95691270629.pdf
    • https://ludifrance.fr/userfiles/file/bikeburisixurukopadatat.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/52beb0f7309c3c637fc9855c2b4bb22a/dokotebafojetepowusakaxo.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6101fd0ca1---revadewapadalulabigovo.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/2763398c6ad9d8071d8deb64340627a3/69929841529.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/qg3laofmjivobf1erapij1alrp/38487763111.pdf
    • http://vitacanes.com/uploads/files/81637159529.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/753598e80e550debf0f4563458555c7c/1494555014.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe88ddecaf---92961479956.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/8jhj1dvgesdapgvco01lv7mqcn/robute.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/tridrl2hd0ucioij1o3lgo8ib3/99304266367.pdf
    • http://adveotec.com/img/file/52936611830.pdf
    • http://fitviewer.biz/files/file/funulenomasejigefipasidif.pdf
    • http://markone-tools.com/upload/files/70707140436.pdf
    • http://euro-ex.net/images/blo
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=cup+of+cha
    • 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_off0000f248.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF248 16792 bytes
font_01_sfnt_off00010a5e.bin
b50de193adbb19b65dc34f424f72f2cf41084f1212c2f9271bef3a81b18c76be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5E 9968 bytes
font_02_sfnt_off00012091.bin
84fa3078c3feeb4c3ae58a702c4c336e833cd1e599d1de40aebb369ce4e314eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12091 17724 bytes

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