Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ab2f4a17c130b8…

MALICIOUS

PDF

100.7 KB Created: 2021-07-02 13:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c03b2055034b629f11588004728574b6 SHA-1: c0fe2799478cc48c6f0d4800b7fc729f33668990 SHA-256: 27ab2f4a17c130b8af57d41efb1468c390c254b181abdf41fcdd05349fffd5c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the structure and URL patterns are consistent with phishing lures designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb0bb22a80---tabib.pdf In PDF document text
    • http://kolaykanal.com/userfiles/files/19199868808.pdfIn PDF document text
    • http://womenscouncildallasarboretum.org/clients/85748/File/58054801757.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/fa0403d9290299d2c10cce225ca85cdd/mariketowuv.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a12f2e1f3c5---86580393619.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/f7qe2g9h218demookltsuc5chk/lipoveja.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab310b3214---wenalovepijagiveliwuv.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad82a4b259---38180233248.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/72731068336.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/43003251304.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f494781ce8---29399942671.pdfIn PDF document text
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/87345001026.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/345fe486be4b6e88b6c46e13bdf9969b/luwuwawovubanux.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/ba0b1d0ecfe06f67475f6ff8fe50131c/kotilowasobozogogupijigub.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/nf387n59n43k0tc0bg8ko4k421/komugovon.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/losakitinoro.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/2820c1014dbe234296de834a1371a55a/ralebajevireluw.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/71203cdb8820d2fd0b1cd575ff93c431/fosojilowig.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/6d52804f734d18444eb389bb133e3b27/48529962537.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/tilevikukekakuruvem.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac62f590d6c---89414452863.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/28b40a9d243ff1a7050499d04e938ddb/82468880720.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/hp99fcmnh52mqk0pstjl7k41q3/nedadosukugaw.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/arprusqo1ahm6cnhn9ouvsp0b3/2041441574.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/jexitowej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=bsc+agriculture+practical+exam+model+question+papers+pdf+downloadPDF 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_off0001244f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244F 16756 bytes
SHA-256: 222e95b9f022c15816ca56b99fb06dd519853320c6c40add334c9f3babeb0402
font_01_sfnt_off0001501a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1501A 11452 bytes
SHA-256: b7002d5c593f8c09e72b44d25a3d10181d8f0824898e33b15e0d1da25e262184
font_02_sfnt_off00016ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1