Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aad265230b39efb…

MALICIOUS

PDF

84.4 KB Created: 2021-07-01 19:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 237ef69b64b4bda23fdf56421d8c27d7 SHA-1: b78942ced923bd643523a638722509e56c3eb90a SHA-256: 8aad265230b39efb3c690735dd6efc0202dc5cdec8c5479ba2f8d335d5053dc8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://drafthe.ru/uplcv?utm_term=foods+to+eat+to+avoid+kidney+stones
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607272b15e21e---23478920377.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/33afbbba08421962cda6177f78ba4d25/zamurosek.pdf
    • http://happypalettebnb.com/CKEdit/upload/files/79003156204.pdf
    • https://avgdesign.com/userfiles/file/50572697755.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f863ad5710---zenopa.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/h27h2os1hta10lh8mnhihobo07/logubidejituv.pdf
    • http://www.radio-kum.si/data/files/pixilefupoxaraf.pdf
    • http://crystal-lamp.ru/uploads/files/witufolilakusirolafap.pdf
    • https://soltendance.com/stockages/files/70157184612.pdf
    • https://audit-advisers.com/userfiles/file/2055399361.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f68c222ee---54879651789.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/ea9523a5924a294c1cf2b87269bf7710/41316216373.pdf
    • https://vildmarksjagt.dk/userfiles/file/kogapivawumakurusajawosur.pdf
    • http://nowyhotelik.pl/userfiles/file/76221827934.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/144935681160bacfec46540.pdf
    • http://baigeleather.com/userfiles/file/sifumugatasaronavuw.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ak7mk2jfa55q8tm540dsshmqv0/zatimegowobufenotekun.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/5b46fa38e7158d6de7ee38d027117546/4921942485.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a1374c03906---19534324928.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/84358732188.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf8a9d7d45---95340871602.pdf
    • https://marosme.ro/hirek/file/zumijesitevilibiraxalinid.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc38806dba---muputexoxajujatu.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a584beb1ef6---16474264811.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760eeb01049---xebafosiraku.pdf
    • 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_off0000eb0a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0A 16792 bytes
font_01_sfnt_off00010321.bin
37f0316b8a6ede071cf65cd3ac28e2c009881c28cbf68d85f6a962f13c61c5b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10321 10344 bytes
font_02_sfnt_off00011a9e.bin
5e107b69d1753985a28c3a4c194d547ada99cfb7089bf5acc0620a24fcc12912
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9E 16084 bytes