Malicious PDF — malware analysis report

Static analysis result for SHA-256 e296dd8127cca9b8…

MALICIOUS

PDF

82.6 KB Created: 2021-09-05 18:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 872ad0faa06a04b27884a93b8e7d6b1d SHA-1: bb99a945f3a63bf0024c81db0b5c3dd128d8ab7c SHA-256: e296dd8127cca9b83a41d47232db22afe74d4edf4e3487d588a5abb4ccd4e5e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to compromised or disposable hosting, likely to lure users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit users through deceptive links, potentially leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/85d5784017aa8e232098854a0a9bc7f1/81251288669.pdf
    • https://hostingalani.com/calisma2/files/uploads/lizesomezemisigewivuli.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/vl5usj58buohfaas663raott90/koxeluletorirozazut.pdf
    • https://foursservices.com/nbloom/fckuploads/file/sineverewulojimemu.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0599049f2---wusogafetisom.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/c29603983b51eeff076fd2fe8f5ae851/29659245035.pdf
    • http://briarcliff68.com/clients/71184/File/48919405319.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/djlvl12rqecesmm6qdsdgokou0/fekesunusaki.pdf
    • http://ithalattagarantibelgesi.com/resimlerfiles/77944426060.pdf
    • http://interreg-ipa-husrb.com/downloads/pumeb.pdf
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/88084942247.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0133a812a8---18260434446.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1608651bac50de---fajawemeweserusepuw.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eca1c942c5---dijakevedige.pdf
    • http://gernano.eu/gfx/userfiles/files/16273811954.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/5d89bad6d76e2b9578fc60688360bda2/60358606394.pdf
    • https://needlugs.com/userfiles/files/32088268760.pdf
    • http://coinproject.com/userfiles/image/file/dezunoxapasitapu.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160c003f7e829d---62243990133.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/0538b0beffea1a6d202071058b873e9a/11831584078.pdf
    • http://ourconn.com/userfiles/file/202108050241002396.pdf
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/li81k25589olpeagpa0p5fdb2n/75538768086.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/16197402560.pdf
    • https://betenrealestate.com/sites/default/files/file/zikokazon.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/f5f8e3080cfdfd542c7255ad63895252/desenomemokixololo.pdf
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/84559238464.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=quiz+patente+2018+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf9.bin
6e05718814d82885e80aec78b0157e81b50b0c7ccd9610ceb8589d31b5bf0a72
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF9 10776 bytes
font_01_sfnt_off0000f52a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF52A 16792 bytes
font_02_sfnt_off00010d3c.bin
3e208b5b662ed3f9aafd2fd0c44ad150597d5e3ef7d3962bf90dde50b8e4c199
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3C 18516 bytes