Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d0e653b492d136…

MALICIOUS

PDF

88.2 KB Created: 2021-07-18 14:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 63721a073e5d2468c857153399fe3909 SHA-1: fe18591b824cfcfd6a1f56c176a57f24beab55e3 SHA-256: b0d0e653b492d136bc89b88267938a696d2a0a940a381023c8d5cedd66fb6b33
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised or disposable hosting sites, likely intended to redirect users to malicious content. The document body is heavily obfuscated and does not provide clear textual lures, but the presence of numerous external links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://kardelendalgicpompa.com/uploadfiles/file/95528995552.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a544b25f8---72790503763.pdf
    • http://bestpokeya.com/uploads/files/fedulokimu.pdf
    • http://aliceinformaticasrl.com/user/pages/vikisikuribakul.pdf
    • https://sunrise-photon.com/upfiles/editor/files/35627139152.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160abaff9a741c---22618706839.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88ee82e37b---89515957353.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb1f04e462---pujegijefosozu.pdf
    • http://flatadministration.com/uploades/fckeditorfile/putaforokugenekajobufojif.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/286776e5121810b96dc2fbbefb01fe57/xabazebi.pdf
    • https://creteservices.com/FCKeditor/userimages/file/mizelulalisuzosumemalali.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/53npamk4fpo515ik3040p584kq/zojojep.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/3699166c37b7fe7cdb0359eac577e2b8/sabanipibakatole.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ea59cdbff---14914331304.pdf
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/1775772254.pdf
    • http://mujuerp.com/uploads/ckeditor/files/20210612220412.pdf
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/ir3slgl098luf3c6425ncukube/lokuledasoxuvemugis.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080db389b976---48803278801.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/1c674040c0b1a1cb10fbe9f46edc5135/84308744418.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/e81ce3325fdf28c8d5e2a3071358ffad/ziwopebow.pdf
    • https://a2designbg.com/userfiles/file/gonazipubege.pdf
    • http://nextgenship.net/upload/file/20210601162253160580.pdf
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/sasosabonet.pdf
    • http://akademia-jedenastka.pl/zdjecia/fck/file/63867114540.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/0r7q4hd6tj75trhems14qm3qtr/43647724698.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=personal+ways+of+coping+with+stress
    • 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_off0000f6b2.bin
7f2206162c0f4abba35ac73cc74989d660412fca8fdc4e67405017ee4ad00a07
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B2 16488 bytes
font_01_sfnt_off00012181.bin
de8c55556584a1bdd551896b290762042de3a82f96b2c442a395ec730e6e81d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x12181 10960 bytes
font_02_sfnt_off00013b03.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B03 16792 bytes