Malicious PDF — malware analysis report

Static analysis result for SHA-256 48aedcc300809eeb…

MALICIOUS

PDF

69.7 KB Created: 2021-09-27 19:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: cd15c291d8a04c5130a5522c139d296d SHA-1: b75b2a4115c15c634bdac87d218e83223adb18e4 SHA-256: 48aedcc300809eeb41c7ba6812c7fe125d49d8a890402a6350f7c905a244a93b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as a malicious PDF by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous embedded URLs pointing to compromised WordPress sites and other domains, suggesting an attempt to redirect users to malicious content. The PDF_IMAGE_LURE heuristic indicates it may present as an image to trick users into clicking an action trigger.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://archism.ru/uplcv?utm_term=how+to+get+bendy+and+the+ink+machine+for+free+on+android PDF link annotation
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140c33808ebf---76348782335.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/puboxojibowawiroto.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/161492009e3bdf---waxurodujepogonibomuk.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/34673824269.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109242319562771.pdfIn PDF document text
    • https://tallerescarrion.com/uploads/file/71318288836.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/bowutupenitodobapominije.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/pupomelax.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/wizoloxadobilup.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/kijezevovususiwa.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/bc574699076fb29a60caca133df1bd5f/putovuxisewupuvabinegebag.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210913_C58FC9E33549789C.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210922191949.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/xufebes.pdfIn PDF document text
    • https://asp2.aiwangyun.com/ckfinder/userfiles/files/35339122771.pdfIn PDF document text
    • http://bckbytow.naszbip.pl/img/upload/files/15284265492.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/xosox.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/91449847755.pdfIn PDF document text
    • http://lokalizacja-gps.pl/userfiles/file/jejojexuxanubububelu.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3c7f61gjpdjl50s0j41iu0ijq5/lefepemaluvuxiva.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/fegisiwimera.pdfIn PDF document text
    • http://supragyn.cz/userfiles/file/23627948568.pdfIn PDF document text
    • http://goldsunjsc.com/upload/files/33426978253.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613739e77f3ea---janubuzuwonajup.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_off0000b307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB307 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1E 11132 bytes
SHA-256: f6ff423e9b1c7349dc16acaf47dc9b84d30414ce59a76ea7caa852fda8115011
font_02_sfnt_off0000e4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BD 14380 bytes
SHA-256: aafd156a636320582984d6ffeace8ace6d865c111f25fd2586267c5d263b9e47

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