Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e802d39ac5b3a7d…

MALICIOUS

PDF

74.6 KB Created: 2021-06-27 23:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4caa0c3842a469edd6b7657b08fff2f4 SHA-1: 78f2d1637f2b00aba08a5ab75c8b8e8c6dceadca SHA-256: 7e802d39ac5b3a7d7fd543f03cb13f26b41bee338d2d3a57e99b64d04990bbfd
164 Risk Score

Malware Insights

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

The sample contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect the user to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • 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.
  • 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://handientu.vn/userfiles/file/rawome.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/h2nptnrve2uneb08e9ak39f2qc/1314735500.pdf
    • http://k-yoga.org/file_upload/spaw_upload/file/20210607043058.pdf
    • http://titibbs.xyz/js/ckfinder/userfiles/files/xurerav.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815d836c093---pepugokikafejebosenuzom.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/081f47a750cc798de8bfb5c76b3700d2/lopumusadez.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/19e271543e5148a6ab9570e6a7d044ca/7768983525.pdf
    • http://cesmclassof68cheyennewy.com/clients/82478/File/vonakuvelanisuver.pdf
    • https://binarbaid.com/public_html/userfiles/file/wusigolaxidelo.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c63634543a6---guval.pdf
    • http://anandtouristcorporation.com/uploads/14194850325.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6e249d0d3---19009172585.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad28ac7df5---nilofobusumuve.pdf
    • http://farmaciafici.com/userfiles/files/21934610651.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/c395fbcd15e150318745b875d12a11a6/baxesujafowexoferederogu.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/613b1d54cafa5c69e66c464877f79ef5/92695249608.pdf
    • https://puppometalli.eu/file/68869419573.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d01498239---40064113750.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609873ed1f989---43673979892.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608323eabdbfd---tokozetunub.pdf
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xarililatufizolezobiri.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/db48307f5d20b444bfd04c85c8c40760/vasewanu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=outwitting+the+devil+pdf+free+download
    • 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_off0000c1ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1EE 16792 bytes
font_01_sfnt_off0000da00.bin
f997cc238d2b77385aaad82689939d9ade30db6135151cd7675ebd0dd1267444
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA00 16180 bytes
font_02_sfnt_off000103f1.bin
5d48b141507ca2f53ecad5f76af6fbbb8e660284ddb60918580b6d4ae8e17780
pdf-font-stream PDF embedded font (sfnt) at offset 0x103F1 10884 bytes