Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9dbd1c6507c115d…

MALICIOUS

PDF

92.9 KB Created: 2021-09-22 14:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0956557a6c5fb44949ec7281ef11a412 SHA-1: 9ff6a41f4aa8671e3e9471a7d104a38342efb493 SHA-256: e9dbd1c6507c115da90257a0e82b0fb5227dbfe785e6fe7e37828bcc4c833e75
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm with numerous URLs, many of which point to PDF files hosted on potentially compromised or disposable domains. These elements suggest the document is designed to redirect users to malicious sites or download further payloads, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 7

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=goodman+%26+gilman%27s+the+pharmacological+basis+of+therapeutics+12th+edition PDF link annotation
    • http://wienbildarchiv.com/upload_files/files/pekizafekaxixuratagokutu.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/zesogama.pdfIn PDF document text
    • http://yujinpharma.com/upload/files/kegijonufuwukipi.pdfIn PDF document text
    • https://wotfiles.com/ckfinder/userfiles/files/30978386351.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/96834586282.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/lazejinisu.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613451ae8df11---wamupogirik.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/l79v6rgea6rf58nh4b8esvok3r/60501172904.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/putajutatokow.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/mifimolobumodadozugot.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/53001380584.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/votofamujoguvijonakatutat.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/57692036513.pdfIn PDF document text
    • https://tomas-music.com/contents/files/bezujigexazojorazugutenab.pdfIn PDF document text
    • http://archbot.pl/files/file/guworomusefibeve.pdfIn PDF document text
    • http://rubensova16.cz/files/file/sixomix.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/badulanidul.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/70932275585.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/gabelefoxiwedokux.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/69543074166.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/71524051801.pdfIn PDF document text
    • http://www.hebrewforreadingcomprehension.com/content/ziwovokedezu.pdfIn PDF document text
    • https://lapdonline.org/file/sapesewedigufevemuvexovo.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/1In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A82 18304 bytes
SHA-256: 3b72ae46daf4725a2012c22529c46cd718524b0398c816f443b1bde880c70d63
font_01_sfnt_off00013a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A38 9804 bytes
SHA-256: 4919b8c37252166c6ac74f4cfd0e8ed6422af7ee8aba25b317ffa8aeda71028d
font_02_sfnt_off00014f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.