Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe7be1e5e72d3d8…

MALICIOUS

PDF

89.6 KB Created: 2021-08-07 02:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5f37baafc480d83c52aa7b12433d636d SHA-1: a4156e7ee6e50f7446b96ba3587a25fcae9a8bea SHA-256: abe7be1e5e72d3d89a4b1a96277ffb1138a6ff2f74a40bd4daedac11723c37a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://coretry.ru/uplcv?utm_term=solar+electricity+handbook+pdf+2019 PDF link annotation
    • http://yas-center.ru/userfiles/file/doxifomopizobore.pdfIn PDF document text
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/1202304640.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/sbldnk2lssmcif057oklunoma7/sirevofu.pdfIn PDF document text
    • https://asiajitu.com/contents//files/rakusetuzevomuzawaxutuv.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/c3punf6qc311ecglbnefd8fv6f/wazet.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/xetazejepavub.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/529bbcd93d12b024f6e4d82f8a996437/nodezep.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/f8668e639b839420e348f8f6c4b1c571/mowalozagokuparetelasowen.pdfIn PDF document text
    • http://ghgunclub.com/clients/f/f3/f3036db30fa8ed97f94f648fc77c1040/File/tukipegekugififixisosube.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/nulivirotezuz.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/29ig8q1k8oaqdquf1avq0vhtc3/dexiwaveb.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/fobilazugobisa.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/tufamaralupe.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/43393635517.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/1nps99j5sjek42qptqf9vn1aa5/xoxijumopelugogo.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/e967be6db73f73227e28469fbf3ff71b/30109728317.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/kiwezuxunexapi.pdfIn PDF document text
    • https://birudongker.com/contents//files/vuwurane.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cfa357b76ea---dopumimudixes.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/lexufivozuxizodakapuwar.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/xemizisujajanotuxefadilo.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/71111570273.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/99227030338.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/1mihbjhv08323do7j4kp6kfcea/roguweniputali.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_off0000f913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF913 16932 bytes
SHA-256: a7c47c650c59b2618737d2a15db1a4500a15bc1ef172ddc4dad831f98ac64419
font_01_sfnt_off0001255c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255C 11432 bytes
SHA-256: be97177fa16a3b72b831fabece425cadfb396847931be931491f4814d7528165
font_02_sfnt_off00014021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14021 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1