Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b96a8518894f714…

MALICIOUS

PDF

78.8 KB Created: 2021-09-19 09:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07ea74bed8de77022ca80d143270d6f9 SHA-1: a80ce49c184ccff2b0c9ea53d1aa46f3ab1b99ea SHA-256: 5b96a8518894f7148c33204f25d0ca620f5f301458a2c195a813db59d1a16a7f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to host malicious files. The presence of 'utm_term=download winning eleven football game' in one URL indicates a lure for users seeking game downloads. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/1v8oi5qr1j266060hc0g70h5k5/gobarituviwesigakupanuz.pdf
    • https://at2-turbo-j3t.com/contents/files/dedeme.pdf
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/34065837995.pdf
    • http://maychamsocda.vn/images/userfiles/file/podaduta.pdf
    • http://kanchanaspa.com/ckfinder/userfiles/files/80891651336.pdf
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/36212571302.pdf
    • http://euroambulans.pl/userfiles/file/14233569493.pdf
    • http://rentaruedas.com/files/others/pamekizefalawuxe.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161427f40e2d30---20466517095.pdf
    • http://tayles.com/uploaded/kapagofimotaturesupisoko.pdf
    • http://hepiran.com/cache/fck_files/file/fowogifokodolegajepites.pdf
    • http://huiking.cn/uploads/file/040133039259.pdf
    • http://frutapacargentina.com/ckfinder/userfiles/files/33941309547.pdf
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/47824205454.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613137f3bdbf4---27161831815.pdf
    • http://lezeckastenakosice.sk/upload/files/69209588152.pdf
    • http://orzo.cz/uploaded/files/memitapunonoza.pdf
    • http://portalkucharski.pl/app/webroot/media/files/xedopovabogexetepi.pdf
    • https://decoveinvestment.com/userfiles/file/mipow.pdf
    • https://ktmcollege.org/public_html/userfiles/file/65623442492.pdf
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/lopisegotewax.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/048f071a5570b030ff6edb3ebd1f0166/puxof.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/161316b83228e6---pogukexifisufadiv.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=download+winning+eleven+football+game
    • 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_off0000cfa6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA6 16792 bytes
font_01_sfnt_off0000e7b8.bin
c2e2cb6708a4b86784f6666887958361273b3214bd9e2b64e5afcc2f6832dcb8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B8 17444 bytes
font_02_sfnt_off000114d7.bin
389396b64ad375d6f0ac5f0f5ca6560189a3d4deeaba403dd9da87fc6a20c903
pdf-font-stream PDF embedded font (sfnt) at offset 0x114D7 10720 bytes