Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e3c7253a5573b6…

MALICIOUS

PDF

86.5 KB Created: 2021-09-02 17:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af7f6be0dcd1519afcf0666ee270c2c4 SHA-1: 0504248824611de613763269af0497aad40a73ad SHA-256: 30e3c7253a5573b6caf238d39af6057b623cf6f8ce38e268719157288e281521
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. No scripts were extracted, but the presence of these links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/41jdne4vbci9aqmede6qqit523/40508628707.pdf
    • http://karimeh.com/public/userfiles/file/fesinusinilukanu.pdf
    • http://romovi.net/sgi_userfiles/userfiles/files/libasegopanazunufa.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7a3145e61---87064217292.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/1412c2126bc69eee88312a76eb4321e2/dolefuside.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d86ef403d4---8562216906.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160c1adffc0fff---vamekude.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/3edd7afaa47a60d885a3df7a36bb127d/sagakuxin.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/61d82b8e84694b8a6f9d38b1ac28d082/nadowemoxawik.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106acb61242e---jemixawobomazojiburebod.pdf
    • https://welltowork.org/wp-content/plugins/super-forms/uploads/php/files/ca787860670558b5696a5e34efb46f4a/92770629561.pdf
    • http://dagmar-e.de/userfiles/file/nokoxagowefarixemuze.pdf
    • https://scavilecis.it/userfiles/file/panekugupum.pdf
    • http://dabaizhongxue.com/upload_fck/file/2021-8-11/20210811075241380020.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c1dec40eb32---31023168253.pdf
    • http://seoulsquare.com/userfiles/file/gakelirakotebewitewujim.pdf
    • http://abacusnancy.com/userfiles/file/3462793047.pdf
    • http://maginsaatmetal.com/resimlerfiles/jelonibulijurosovoku.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/2rkf4o6ed5ildqaug6aeo3cjcf/77899986308.pdf
    • http://ehs1958.org/clients/73155/File/79392217505.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0787af301---64181525016.pdf
    • https://aonetreks.com/uploads/file/tikekejifonilifutu.pdf
    • http://au-zlato.sk/upload/files/87126315611.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=sd+codefree+glucometer+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_off0000eaab.bin
6e1960bfaae93a2c4f2c1c30dabdf07e0116b04bbf08c25cbbfb590c5ed734c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 18948 bytes
font_01_sfnt_off00011be9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE9 16792 bytes
font_02_sfnt_off00013400.bin
acf43d7ba0ccbfaba25b01e138900b29b2328d42f83114924c1873cfdd03448a
pdf-font-stream PDF embedded font (sfnt) at offset 0x13400 10736 bytes