Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee29c77a2e9e2645…

MALICIOUS

PDF

96.4 KB Created: 2021-07-05 20:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6ef679b34de4cf2b77931a53b06d5dcc SHA-1: 4b9482323e3d9c7db8b212d78ab1848b046b3a8d SHA-256: ee29c77a2e9e2645d9d5e4f139e2bce76242b7e482ca01168f965b8d84396671
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised websites or link farms hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farm heuristics confirms the document's primary function is to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://catamma.ru/uplcv?utm_term=latex+comment+line PDF link annotation
    • http://ytbozhuo.com/upload/file/180838388950.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160cb5c3680781---91598273666.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/redoremibumofapexu.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a517d796367---nugurel.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/qu31kdj4v7nbveo5ita690i004/18544567704.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/1ccaac10dff4c74a2e44ff87421233b8/32093673290.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/22020855071.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/2978019c5beadd75dd45373279a9aa4c/vilabiziwovurumugem.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa316240f7---99770851981.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c593ddeda05---sazifusel.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1de49c83e0---sizafejuso.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/fujavezakoxem.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa98a5dcfc---30081418756.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/lijowewagawixotur.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/e0kbk3i0ivq12i6ltm3v95tnuk/pudodimijidoxinanixobiz.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/b05fbe653b42d6c037119108e24d6f63/fujakivesutojit.pdfIn PDF document text
    • http://hevolta.com/upload/file/87012067962.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/32385901101.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/43846267446.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/781cb0f8f87995e1d4c9ce197b9cdecb/59073668189.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/aa31a142b66fcdd269b103eb8941fd7a/wimifudowodoj.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/praub23i1g7s1qk5q4ov56vo9a/dunojimomumuwedanuduf.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/senojisodizaposezomujigo.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/fadenuriju.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_off0001110e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12925 10180 bytes
SHA-256: 2b53489202defb2450f08e947146ace9a93cd7cf7831a842d381a153505535b1
font_02_sfnt_off00013fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE9 19968 bytes
SHA-256: 19623acaecf57304d9c0971b72ffe29de4fa86c374a101d17aa00f4b4931a357

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