Malicious PDF — malware analysis report

Static analysis result for SHA-256 0067c8063fdc5ebd…

MALICIOUS

PDF

95.8 KB Created: 2021-07-21 23:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 587ea817993a8fc772b43b35df2b0772 SHA-1: 48cfc8fb7cfa4eb90ae4e3a0d036734efb5429e6 SHA-256: 0067c8063fdc5ebd83b037f59ee6c482b3af19b1f57fcde6332f941eabe83201
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites and other disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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://absoluteanytime.com/media_file/files/files/30983994283.pdf In PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/vnlcr94bd0oask7usmb9ar33iv/42211944421.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732f4fd3a8f---jimukutipapojuse.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/75236256299.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/bigoxagivedejefapatupe.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/48185201340.pdfIn PDF document text
    • https://inncredel.com/uploads/bunusonubipidubijamefaz.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da5f97bfef---88368040387.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609490ee6ac45---65675433039.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609853ec83017---velokapigonizovitekasof.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/73920296486.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/tuturegitijivovovodumus.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/menizulonugatufonavedow.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/qff51ahap927nttiubkiaq6obp/werikab.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/bj6fhfvvj3oampfsr057p06sj3/posenu.pdfIn PDF document text
    • https://teddybestore.it/file/94040680799.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/54666332962.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a697304d72---wepozimojulikugozi.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/piduwamugejudikiresimusod.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b068cd3895c---bedapezejinojumasujowifuj.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c4eaae9b7---litirito.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/xopewozilokewolajudamiri.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160849f0d61ba6---44004983218.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/60a7749b1571ab9b9e45ce5524531800/91743757427.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/9e4fff98168ecf4e38d248594f825170/liminojuvozuvivowoweja.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/cfs5lfmm400bluhf2shmre3o7b/zozisusuwifisibeziwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=good+morning+wishes+for+boyfriendPDF 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_off0001137a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B91 10872 bytes
SHA-256: 9892e14446bc6f462207c57ac5f736705c3df3b9c54ed1ba342eb4924f72fd84
font_02_sfnt_off00014450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14450 16792 bytes
SHA-256: 7e99d6ec3225b2db63e68e536104d2f68431abaa842289a9339af868418cc779