Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06183f93b3c0c6f…

MALICIOUS

PDF

70.2 KB Created: 2021-06-26 07:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aac14db982a8b7f88655981e424fecce SHA-1: 4fb6f6620a55666d6a99a3002b3888d7bfa5b512 SHA-256: e06183f93b3c0c6f9174f93fe18afe04aa3bc51e11262a516f7fb192db8f3fb3
156 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to potentially harmful content. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://jagatjyotischool.org/jagatjyotischool/userfiles/file/32981787699.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c901793f808---remukefevorelovowoxo.pdf
    • https://maclashoes.it/file/94430533703.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/8njas7gndone9hbac69jkll75b/9876689288.pdf
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/eef694dd3c375a3589f6d0002c483123/degeruzawidafedi.pdf
    • http://cesishotel.lv/res/wysiwyg/file/rezadevekalifuwixu.pdf
    • http://archi1919.com/smlclub-files/file/78898892657.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96d05a7997---57176132767.pdf
    • http://aftckwt.com/uploads/file/94052486961.pdf
    • http://jar-ted.pl/file/vikum.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/f4d4a7d0a6ba540ff031ac3f7eb06fe9/61853321599.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16082222302b40---20788258650.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a711f246d---rimikipotasedopobif.pdf
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/49666345446.pdf
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/a368b5e8fee3990f3f97829e5d661e28/97850377060.pdf
    • https://sonarmusic.hu/up_image/file/zekomex.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/njoiuh3g3s2355934mq8mgb9t1/dosaguzamix.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/7a3a5eae161037e1e4e5e9914649a3a0/wakozamujoxili.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfda2e0794---nebagilu.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/b288ffcdb928956fcf4c74c84185754b/40544383921.pdf
    • http://freetourscadiz.com//ckfinder/userfiles/files/82009656155.pdf
    • https://triosms.com/userfiles/file/272738430.pdf
    • https://digireg.org/upload/84648729880.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+calculate+sum+of+infinite+geometric+series
    • 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_off0000b1eb.bin
568841d8700ef8b173df2253d13c497c638c4fc9d93c21814e68d4826b95fcb2
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1EB 15008 bytes
font_01_sfnt_off0000d806.bin
76ce5f059fdc49c0180b9e76c52af74fc251aef9f96d4016479c3d17ec7f8f34
pdf-font-stream PDF embedded font (sfnt) at offset 0xD806 10856 bytes
font_02_sfnt_off0000f119.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 16792 bytes