Malicious PDF — malware analysis report

Static analysis result for SHA-256 f475dcb82d190f82…

MALICIOUS

PDF

86.9 KB Created: 2021-09-04 23:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4c9aed874ce98d2c2be6624d9ec7944b SHA-1: f0a8040a4c2ab046bf69b36fe08a60c21089ca85 SHA-256: f475dcb82d190f82d0bfe438ecfd1f323eb57cd7c81bbe1c926f5ff65d36c0b9
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://adveotec.com/img/file/vuregosemomavunamimibeboz.pdf In PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/9934c81ac76db59206e0181f1060abc6/berudewavi.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/84909472009.pdfIn PDF document text
    • http://chapraptti.org/userfiles/file/pexibaduvedugixopuv.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/dorewosijokuf.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/lixugabaso.pdfIn PDF document text
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/fevezakewaromejakagu.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/kebejumupubovabem.pdfIn PDF document text
    • http://metall-press.ru/files/nuwuku.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/surulininufetofovikufelot.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/33761928701.pdfIn PDF document text
    • http://sparkpro.lv/content/file/12301493478.pdfIn PDF document text
    • https://rentcar888.com/uploads/files/202108300425561024.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/ec69c23f8b3decbc3918e27f14c32585/10146372787.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/6b67f9d4a25e80482eadbcc046a4785b/21392156610.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/0cba008fb6455d71494fc330c167a300/9532360819.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/sololidojidozepujexugol.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/wajoj.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160799ac42903f---64112321965.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/i5mlakjb4t322h7iv2ebm2f2ek/74120982218.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021052107414250.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/70105801580.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/1322f0b137cd8e756b49df0ef701a604/tunajatifekitosamuzi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=thai+airways+annual+report+2018+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_off0000e7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AF 19992 bytes
SHA-256: ed834f5995016e6d44d3bf2dfd6b7a3768f506760eae7d98d73e4e76f3895880
font_01_sfnt_off00011a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B2 11360 bytes
SHA-256: bd684f757999db8f96e4b69cd44e256b77c90412787235ebc256e9f6929e9880

Open this report in the interactive analyzer, or submit your own file for analysis.