Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7d39e30713e74f…

MALICIOUS

PDF

79.6 KB Created: 2021-09-05 16:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bb9f8f706a4bcfef294f71d6fb342fdd SHA-1: 20735a9b57d58aed472f2bcf340a89fcac6d2279 SHA-256: 0e7d39e30713e74f52681471916397efee532d93edbbab9038ba3dc2e6e17b2f
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories. These links are likely designed to redirect users to malicious websites or phishing pages, a common tactic for distributing malware or stealing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27e5cade4f---91803447763.pdf In PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbff9b571a---dawejurudozomawakadavi.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/jojuga.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/gemasazefupufakaf.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba9d4a5b4c---65750842473.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/v8sqlu360ar1sf7mc1kllb9uqs/kubefisomubufodupagonupol.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/bodekuzudanotumab.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/e309fb4d26a448c429299d3807106802/suvisowunigoz.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/hc97ehvbneogvmcek7797iqgm2/bapewusid.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/lajuwu.pdfIn PDF document text
    • http://safarekhoob.ir/basefile/safarekhoobir/files/lexupudopumefetimajo.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962f028f99f---jiwijaja.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/nabegoliso.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/f94fa2bb8ba3140e1c7b2b712ab180d7/59793247397.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/11441092712.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6dfa7fdd6276089d716f3f283862e58b/ladilagaru.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/80257149058.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbc344dde02---xuduwibolaweti.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e34fe76a839---xofujepubumaxumiwav.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/zugajugokobijasuziw.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fa8b41276---65839485881.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/vasadepizafugarivu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=lathem+time+clock+model+5000ep+manualPDF 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_off0000d1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F4 10916 bytes
SHA-256: 1927a037274f35ec95e72d377b21b2157b22a4604fcb43f45c9d4510e9404d06
font_01_sfnt_off0000eb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10320 17504 bytes
SHA-256: af23953dc9b4d93d9ad54211bff52a4e620848e201e44dc9120f8a8770a9b6ae

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