Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b069878da68e89…

MALICIOUS

PDF

75.7 KB Created: 2021-08-05 03:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: ea8a546572504da0875fcddd248ed00f SHA-1: 389df71a882fb733e678749d12fdaf9bd56443f4 SHA-256: 90b069878da68e89b5d7fb7b2306879f142f0494b347a877e15c731611b1f050
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS upload directories or are part of a link farm on disposable hosting. These elements suggest the PDF is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=belle+et+sebastien+3+full+movie+online+free PDF link annotation
    • https://ludifrance.fr/userfiles/file/kigog.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/52516767796.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/jebeperisovofawabixuji.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/u692or4bs4v7q63llc32dued8u/vesotafewawulazikiresel.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/a5905a853439b2781f0854101987833e/mamununokugelitat.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/sofewu.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/tuzosigunuje.pdfIn PDF document text
    • http://babamoleskine.com/files/file/96103581762.pdfIn PDF document text
    • http://derma-dts.de/files/file/ginojis.pdfIn PDF document text
    • https://www.bankkartya.hu/js/ckfinder/userfiles/files/puvezusinifeluj.pdfIn PDF document text
    • http://smithandfriendsfamilyreunion.com/clients/d/d0/d05d9bb0b75700e7199fc64e52c62161/File/gibezubenomedigiratarizav.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d15dafe2c---zapiku.pdfIn PDF document text
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/taxowexunodenepepolimepez.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/7ade541971f1ef8afe0c34317a3f045f/vedaka.pdfIn PDF document text
    • http://leilehua76.com/clients/4/4d/4d80c013f15dbe3c797666a457780dca/File/tapulowowanunopowojaneb.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/ditazuzibipipotegerired.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/63775947184.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/3705acc9c138034876e68bddd43ac8f3/26080462412.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/65837125009.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/7795ab3210fe1fc155e32cc072f42fef/joxopurakenejatirogenotu.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/buvodidujisezuvut.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/mitizetujer.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/lugtuioupah9s6h853qpdh1llc/resebawezaxoxovudoxoxamug.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/no8d1osn4l5or2mvuap9c11n40/wifikiwumigajutuput.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_off0000c4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCB 10908 bytes
SHA-256: 8f14033931187e05432029a668cea3859c6372e7f159a65cdf7f6362796baeef
font_02_sfnt_off0000f612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF612 15720 bytes
SHA-256: 1d739d8906b46797080fb594f6bd40cbc916626ef9ff5802f0ee9f50fb4bf53f