Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e19199d5343062e…

MALICIOUS

PDF

89.2 KB Created: 2021-06-27 16:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 030fc7cfd187ea923a470b15d145c988 SHA-1: f3362015739c311c5f23e0150c28ba8cb8e373b3 SHA-256: 4e19199d5343062ea9247f023031b46c3b912ec11c57cea60512d706541a702c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to execute malicious actions. The file also functions as a link farm, directing users to multiple compromised websites, including those hosted on disposable domains and potentially compromised CMS uploads. These elements strongly suggest an intent to phish for information or deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pistant.ru/uplcv?utm_term=draw+a+lewis+structure+for+so2+in+which+all+atoms+obey+the+octet+rule PDF link annotation
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/81207087114.pdfIn PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/gugijubewimufugukigizikip.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ada0fb0165---datalefameri.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/e40fa6b584bc5c45bb947ef0645c2c6e/83718104261.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/ql5d2sebprbos05680tf2h9gs0/75577717817.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/a9368620bfbfc313f4a0094b2426cb79/25437599719.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2129cf54e---jopusotaxonixamadomibus.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d29223e64e---dagerofilajibogupo.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/folaxunozol.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/94221597759.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/21418651994.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/64349167269.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/rulozifipanex.pdfIn PDF document text
    • http://mayfamilycircle.com/clients/5/53/53cd9f4101e72b768929e5daf979c2da/File/kudifew.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77f2eacd25---50914155181.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/338b0be5a14712aaa36a652930cfba2c/53728788038.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/guparixu.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087233fa811f---jotabewutono.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/vavorafuvorefawereze.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba983580ad2---xorobimonurazedotefilu.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/felitimutafu.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/eir0o2o6g2161b0ea51246svpd/60358930241.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbb82333a4---32900494705.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001028c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028C 18868 bytes
SHA-256: b133686358f779db283f88009fcb7ca92d2b9e989897586aef407446239eff88
font_02_sfnt_off0001345d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1345D 11160 bytes
SHA-256: d7a2729b358bc171beea15b55d4f848b98a8e1bc97e55f7b9b120444ad8dab8d
font_03_sfnt_off00014e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E60 1732 bytes
SHA-256: 5b3c947262022625ef2d4cfb2d0fa10a94f23c97611fd4c7364bfcc62a76ce6a

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