Malicious PDF — malware analysis report

Static analysis result for SHA-256 8057a681a48d233c…

MALICIOUS

PDF

81.0 KB Created: 2021-09-10 02:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2959a189e69eacdffff7b248b70eea2c SHA-1: 5bee19923147ea534a2195b9776eb49658a6c8f7 SHA-256: 8057a681a48d233c6387a672a0c0538bf5123d3c17df63d748bc1c53a1825ed4
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and presents a link farm pointing to compromised WordPress upload storage and other disposable hosting. The primary goal appears to be to trick users into clicking malicious links that likely lead to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=league+of+gods+full+movie+download+in+english PDF link annotation
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/01f633ef145cb3d6fbb0b1275ea5fdda/basufifoj.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/pobexizusuvanexiseve.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/rogaxivikabej.pdfIn PDF document text
    • http://www.childofafrica.org/media/userfiles/file/sefisobumakezixemobi.pdfIn PDF document text
    • http://slhospital.com/upload/fckeditor/file/59833836795.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/94118909793.pdfIn PDF document text
    • https://techlan.pl/files/file/86719736209.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132921ee667d---13096285292.pdfIn PDF document text
    • http://gamaxmotor.cz/data/dokumenty/21429615787.pdfIn PDF document text
    • http://batistar.fr/userfiles/file/vedaverewu.pdfIn PDF document text
    • http://swotaweb.com/img/upload/file/60261471283.pdfIn PDF document text
    • http://parikshitconstruction.com/uploads/zodotuzepuwakikurezif.pdfIn PDF document text
    • http://vigova.com/Images_upload/files/xedizixazukat.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/pimajiz.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/xavibovuduvirunuperugis.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/jubosozelovepifovil.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/fiwujigadujape.pdfIn PDF document text
    • https://tepihtrava.rs/files/85225831670.pdfIn PDF document text
    • http://gammatradings.com/userfiles/file/raranupexemasapolubegob.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/0gau8m4c193od8nduqcdkbr8b0/jifux.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/92604854995.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/55038628994.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/wurodibarixidetubukiput.pdfIn PDF document text
    • https://oreopay58.com/ckfinder/userfiles/files/xeven.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b5ea18263---figomesud.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD971 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF183 17072 bytes
SHA-256: 947b534539affaf6ada7b827e1b2b598b52b02bfd2f222782f8c359877fba93f
font_02_sfnt_off00011dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAB 10812 bytes
SHA-256: 7aedb5a49b49d229127b68b2be59f1ca6bc418908fc789e4c892cbbe97669f50

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