Malicious PDF — malware analysis report

Static analysis result for SHA-256 054e088d182b5ba9…

MALICIOUS

PDF

77.7 KB Created: 2021-09-04 10:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d4f40a8da4b6aa9caea1d97f6a0650cb SHA-1: 76058dfe3f85f3d81321dd7d8f3d2d0ef37b8a9e SHA-256: 054e088d182b5ba9fa9891b3546dd4b5843af49b660d897efca10565701e9d06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it is designed to exploit users by redirecting them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://falconartistmanagement.com/ckfinder/userfiles/files/dojalidelumorofameg.pdf In PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/541a5b2ffbae786092b145380f8740f9/57027875492.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/nedev.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/d6743be3edaeb24a649ce08a5737fc32/zulokaturinev.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/vitevefewofaweraku.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/4912583851.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9cb02c733---vexobuwexat.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16082dbf8c9b27---39862675937.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116bba0a5444---rubasitidanedut.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/senibizifajimib.pdfIn PDF document text
    • http://waterreducer.cn/d/files/42636074046.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/famadarobenelenoru.pdfIn PDF document text
    • https://vr-spagna-20.effievirtual.com/galeria/files/lovegefunup.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/811490ecae6d6663ee65a77122e1103a/59728005682.pdfIn PDF document text
    • http://www.toptehnik.si/images/jekuwurigagonigajeles.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/rorisanovojadovu.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/bafafamoxisaxugebasan.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/d71hfb7eusk5ufv3nn59d559pt/98678279394.pdfIn PDF document text
    • http://lobi.md/userfiles/file/78847034733.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/aa944d2b39b6f8044158c5fb1b04b49d/gokeziv.pdfIn PDF document text
    • http://katachizu.com/img/news/files/muxonubozuwepukawabul.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/rerotepuzup.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd26317566---80980242813.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16086af119b945---fikaguje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=sejarah+nasionalisme+indonesia+pdfPDF link annotation
    • 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_off0000ccee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEE 16872 bytes
SHA-256: 629b5d8d60a65775355fc8a97b504c6bca550e2f2580ff97fb298802bb1cd747
font_01_sfnt_off0000f80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80A 10868 bytes
SHA-256: 08f58af1d32b930df77b933cd89088c4b00e442a0380dd05ee857e3e4433498e
font_02_sfnt_off000110d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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