Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd8514300926c41…

MALICIOUS

PDF

96.4 KB Created: 2021-07-01 00:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b76ac2c73b97bde6d9a23ae68c794750 SHA-1: 10a03127ddc6a7d34e76dc5ab43131fc059f6924 SHA-256: 8dd8514300926c41863b28c7b395f3cddf8873f8c3b88561588e3a2f83f10950
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms on disposable or compromised hosting strongly suggests an attempt to distribute malware or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/0od9n2enoi27iqi8qr6bci2mad/duzapojivejalasixiv.pdf
    • https://inncredel.com/uploads/55251066916.pdf
    • https://albawadiroad.com/userfiles/files/90260710071.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/27512fed3d53c47fa95ddfa263a10d46/86802853530.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/73hch7nhqa14363f1uirnl6v60/sivejanulipopevuxoz.pdf
    • https://amatnieks.com/pictures/image/kumijafanatuteni.pdf
    • http://ourhkg.com/UPFILE/userfiles/files/2533568506.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/af90b3c61cc8521de59bb5f283054b5f/sujumulusejigizuwaxavo.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd447f9b484---koxemorujakaf.pdf
    • https://batikatravels.com/userfiles/file/sevunometebusexodezonijil.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/c69e9528094dce4528ee8a5e73dd01bd/masatekavimexugu.pdf
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/4c95417044f86edef908788c23f9e3f1/kapemozedekizeterenola.pdf
    • https://newtop-eg.com/userfiles/file/44243122636.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/9afbe390ce670c649a3a5ea3b0e14aa7/69059156738.pdf
    • http://jnnycc.org/userfiles/file/1505222436.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2146f28436---90525111436.pdf
    • http://dulichgiahy.com/upload/file/rixovasagezexadisap.pdf
    • http://animationcoach.com/userfiles/file/82661182855.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962fb4a09c9---tapefog.pdf
    • http://solyaris.pro/admin/ckfinder/userfiles/files/nosefokutolewivukidine.pdf
    • http://teplospectr.ru/images/files/zefitovevofekonadisem.pdf
    • http://crisismobile.com/ckfinder/userfiles/files/vonugojuxegipimubir.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160abf772ae026---senafapeje.pdf
    • http://aapltd.net/userfiles/file/63579237257.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ci0fobkhm87j1ag9cnf3bp9ss3/66547315690.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982c0b72139---pafetevofomese.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/f17450cb145d26717d5ad15501211b67/kibinanatukofolewoj.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=reflux+while+sleeping
    • 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_off0001136f.bin
075af712cf2f057eb00d7d5dac233a2822843a7566e44270c2736a5c0e274e9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1136F 17940 bytes
font_01_sfnt_off000142d2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x142D2 16792 bytes
font_02_sfnt_off00015ae9.bin
c73f98edbf8fe60c2ebacf091163da019bc57e4eca5045a511f7031620530659
pdf-font-stream PDF embedded font (sfnt) at offset 0x15AE9 10488 bytes