Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c116c693ceff27…

MALICIOUS

PDF

101.2 KB Created: 2021-07-31 04:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8eadad7e28bdcab5a32f4f11114e0a63 SHA-1: b747c856e3fece875b1791e9ee4f87113514f60d SHA-256: e7c116c693ceff2745f7bc954efcf569a0ca4b1b4a03451aed39781aae0d6ba7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many hosted on compromised WordPress sites or disposable domains, suggests a link farm designed to redirect users to malicious content. The 'SE_URGENCY_LURE' heuristic further supports the phishing pretext, aiming to prompt immediate user interaction with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9858

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://inwebjor.ru/uplcv?utm_term=is+dork+diaries+inappropriate PDF link annotation
    • http://servmed.net/userfiles/file/57263070192.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092fdb58a056---61645518606.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/70034516771.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/52d055de638c9282501cc3ee414eb9bd/878180781.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608096bd2d0d9---vifivaraxiku.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a550c6123---lofakegasetovabuna.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/e6ptc01n9t1v8ara0klboc672a/65318782788.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c39956214da---rosimofanifizokurigunokof.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/2ct8bia0m5n7ssmk3r8s2lpr1e/26863599916.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/48432011043.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609e01dceea28---2165697509.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dce993000fe---jexesagujusiwedixin.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/nudimirurofimemoje.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/eee5282757d58fc43f457ce00e25ffa4/59341465012.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/makemusuj.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/72388016728.pdfIn PDF document text
    • http://kbchina.de/upload/fisisifaweseniv.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/bujezapuje.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607db37422b3b---tofemawodon.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/ledabok.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbefdd5828d---3199190933.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/6f4ebeb4110625c6fc6721efaeb1f08b/42276615095.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d13240beec---68981295931.pdfIn PDF document text
    • https://mo-space.space/web/img/podborky/files/wefeb.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/23611191801.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/papokisi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB4 16288 bytes
SHA-256: 47701b8b47c77a0cf28aefe4b4308fedd425eff3654fefb6465933fee19e5195
font_01_sfnt_off0001247e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247E 10384 bytes
SHA-256: fdd4c4712c33e33885a8b037112ae0348f8da8ad67bde2982444d4adeb4b16d8
font_02_sfnt_off00013c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C0B 18440 bytes
SHA-256: c26b19418f16bd1775a38c56f3d5cd918858610c7e56cc814513de507438616d
font_03_sfnt_off00016c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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