Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0076c5ee35530e…

MALICIOUS

PDF

85.4 KB Created: 2021-06-14 08:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d023e29cb8c926107ba641d967054255 SHA-1: 8d289194f9096877f463142d119d1627356e7102 SHA-256: ed0076c5ee35530e1f3ce17c8b18f554584af18a8ccfb9fcd678750099e1fa12
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute malicious files or redirect users to phishing sites. The presence of external URIs and link farms indicates a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://synerhu.ru/uplcv?utm_term=download+pokemon+leaf+green+gba
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/bcb0565494af015109013eed28dccc57/vorojakexudafaz.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b27d5f294---62167955035.pdf
    • https://gangnampools.com/contents//files/88632608853.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d57a76671d25185f1d98e21523b7ec99/noboxugegutibalejosefana.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/88567e86fc3a054179098abf2a4a0b9d/guteforewaxavipurowe.pdf
    • http://alpanelektrik.com/depo/sayfaresim/file/31323127072.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/fkfm1kcd0p9okibltm9sj80gk0/wifufunetuxanekuge.pdf
    • https://samarpanbharat.org/trila/userfiles/file/vididanojilamuzururuwome.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/6a3dd4d9f0c2f194531963a6b8e03810/fajevisibedozirig.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d78c14e5f809577fc4963b1be74dab01/94710505793.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/7da5d41ec71578c27cfb2d6e604af7bb/tedutodutufinos.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/f058c2f243fc5b0f2d0d21c507af24ab/29520926872.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/d89c45a374819c749f36fa6936e14522/nuxozigamajomobiv.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/uqog9fhqoc0hhr7e04ttrjca6k/vadojuz.pdf
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/10462351618.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16077eb24ba232---kivatirinosixajukexi.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/c0f1059da41283166aed03cd7778c5d4/41053347783.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e657.bin
8037a7e84eead5fdb01904fedd52c837a8d8571634b850c5fe02594c14ac3f4a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE657 5476 bytes
font_01_sfnt_off0000f8f6.bin
4146d729a3dea1d2a6c4ce50baeabf046ae731dcef213010d4c59c6ac111434f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F6 3368 bytes
font_02_sfnt_off00010397.bin
f0e8961953b8c39cc8e988b49fe870ae087f4adaf70e77d61092ae2c1ecbded0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10397 13720 bytes
font_03_sfnt_off00012d5b.bin
2c29292a17291e7f1c92c8419eab535ff5b2f38a6dc6ec194c2fc74918f3b9f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5B 17104 bytes