Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded20a04e56b3e85…

MALICIOUS

PDF

74.4 KB Created: 2022-05-29 21:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: e25ede6eb8d883ad7fb322bb6f069fb0 SHA-1: 54608fd09daffb80b50be0f736c3f35fac04b53c SHA-256: ded20a04e56b3e85e2da4b56432526f8d45f07c02d693091f95ae7188eb7a6e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised WordPress uploads or disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phishing pages. The presence of embedded URLs and the nature of the extracted links strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lazav.co.za/YmrXLWy8?keyword=jones%20sewing%20machine%20manual%20downloads%20pdf%20software%20downloads PDF link annotation
    • http://eunlocker.com/Images/Editor/file/47612772558.pdfIn PDF document text
    • https://tanoviruxejalun.weebly.com/uploads/1/3/0/7/130775892/kaxazowerug-pavaxavazoxuri-pawekodilipej.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/pozijimad.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/vesixufozorine.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/towigetitamopewujoxam.pdfIn PDF document text
    • https://gomepenet.weebly.com/uploads/1/3/0/8/130874128/902cec.pdfIn PDF document text
    • https://segurodegranizo.ar/noticias/fckeditor/file/11893552399.pdfIn PDF document text
    • https://vajojesorenum.weebly.com/uploads/1/3/0/9/130969616/4552702.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621e6f854f8c2---13996804893.pdfIn PDF document text
    • https://xanojamazifedim.weebly.com/uploads/1/3/5/3/135323589/f879fdd2731c.pdfIn PDF document text
    • https://jiwanozote.weebly.com/uploads/1/3/4/3/134354006/1ad0fa7.pdfIn PDF document text
    • https://pabenegoje.weebly.com/uploads/1/3/4/3/134348732/d0956b4b.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/64620952095.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/162374384d0b22---40333250806.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/9rlr4cmgcpspunvm0eprd0pqhc/vavor.pdfIn PDF document text
    • http://agenturamotivace.cz/uploadfiles/file/63773780186.pdfIn PDF document text
    • http://quangcaovuanh.com/vietkiendo/upload/file/bomusamedoga.pdfIn PDF document text
    • http://canevastoilestjean.com/upload/editor/file/3553124644.pdfIn PDF document text
    • https://mondoaudio.it/img/uploaded/file/14584941516.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE61 16464 bytes
SHA-256: aee815ad27aa3deef9ff47c19e5060f5500b7c2f599e475e4d01d3be581cba2f
font_01_sfnt_off0000e90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10122 11244 bytes
SHA-256: 620d5ec0d15410a9a877d72246075a7445097be2bac20d19e4ea70c7b21e4f23