Malicious PDF — malware analysis report

Static analysis result for SHA-256 e006df78db81f56c…

MALICIOUS

PDF

82.7 KB Created: 2021-09-03 09:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5dd3f4b1655794bc07b0c10585ceae83 SHA-1: ea8033e81d93f4bb3bd83a209038ab3bccb36e86 SHA-256: e006df78db81f56c71357708e08fd95289938b0490f10f8a3a9d5ecfa03c2b3c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://aldurra.ly/images-editeur/img/file/25021690367.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a77ace67277---15111875167.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854349ded66---23108288838.pdf
    • http://paintmaster.hu/js/ckfinder/userfiles/files/67690469466.pdf
    • http://jhroseclassof77.com/clients/45984/File/zesepenerojawi.pdf
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/1o9e4ie26hj7b575k37fecurnl/90875744088.pdf
    • http://stardentalcare.org/userfiles/file/fuwuxuberetobo.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/b8pr6odhn2orjgaj1f2tbrkfm2/35552819827.pdf
    • http://ibtaker.ps/userfiles/file/tevibig.pdf
    • https://aldurra.ly/images-editeur/img/file/60048542814.pdf
    • http://hfnhsw.com/upload/files/nekeno.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c09c727c2cf---84313224638.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609493e77bdf5---kakukodivarix.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/dc6f55e15d8fceec5f0e5447ca83384a/riboporofawo.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/guluwigijapufipidotowav.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/c3gm990s215hrcqrssp4agqovs/76223506955.pdf
    • http://carnow.jp/js/upload/files/xuvuredobivu.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d177033d2c---mazixunoxexex.pdf
    • http://technoauto.jp/js/upload/files/91563370726.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160aa12f822556---totigokigipovuwodeboz.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/b87sdeg9sf1ot43r45dq5c98p3/tipelijuwuma.pdf
    • https://santchavarabed.in/ckfinder/userfiles/files/6037961410.pdf
    • http://happysmilecard.com/uploads/files/palarix.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=nuwave+infrared+oven+user+manual
    • 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_off0000dd6b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6B 16792 bytes
font_01_sfnt_off0000f57d.bin
7b64cdedc9264dbdc61d64423f657a4a703ab11492d54a8e9fe5b58fcfc99606
pdf-font-stream PDF embedded font (sfnt) at offset 0xF57D 18336 bytes
font_02_sfnt_off000124f2.bin
db564fae89f141f0ba33d140d6d0de2684b7c21706dc4170d85382f95be5bae0
pdf-font-stream PDF embedded font (sfnt) at offset 0x124F2 10644 bytes