Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed6cb5569637f1c…

MALICIOUS

PDF

133.6 KB Created: 2021-06-27 02:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8943ce9f2718e1912432b29195ab3ffa SHA-1: b1363d96cdaf4c8e8916a1a83c91fae2dc9dad1c SHA-256: 1ed6cb5569637f1c653339ab69a62bde29c7789c9e569b96480c456e11a8e957
164 Risk Score

Malware Insights

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

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to various domains, many of which appear to be compromised WordPress sites hosting PDF files. This suggests the PDF is designed to lure users into clicking links that lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://binarbaidservices.com/public_html/userfiles/file/56352805429.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/eae10351ceeabbba878b3e9caa5cfd7a/1726099743.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/fbba5346f51ae73301314889714e4a96/gogekitatofivaliwi.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4dd95ee39---lawujasaxel.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9ade67a2a---48136650361.pdf
    • http://bakoca.hu/files/file/73802838179.pdf
    • https://liniagdanskzydowo.pl/files/65245850743.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/eb5kio76er7cj2sdron6036pkc/12640905338.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/tfqm8c5j77ejmbhtsijjuqtfu7/72224416003.pdf
    • http://championsview.net/userimages/jukedatobinelirodereb.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a552c164c---91312489212.pdf
    • http://sk-massimo.com/js/upload/files/4552877007.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160818da00b36f---matitegevagovudafof.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160ab68277f46e---puxapewejabuxabegive.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/metibenukimiwukugebu.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/007e798e9fac4992f1a678a348cb6f7d/1476549380.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c014a8621c---78759668294.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/ac657a29c241197ad341e302337ff288/72428574056.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/qollmgtdopivnolb01jl7m7va3/debavojesalejuwekudap.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/42ef079f7b5505a5cb03653a135dfc29/23672255237.pdf
    • http://changju-hotel.com/CKEdit/upload/files/ragefip.pdf
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/67493054437.pdf
    • https://aulacvn.com/upload/fck/file/gosuxazamokawuwijumalinil.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/5ae8864898e4d8e20a49d6654e26da7c/763299385.pdf
    • https://washlounge.in/ckfinder/userfiles/files/mesov.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=get+your+hands+up+against+the+wall+and+spread+them+lyrics
    • 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_off0001a976.bin
e5ea60e2bb307f8315fe80dd5273d95d438fae6ff8bcce22c3fe3f6909c3c252
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A976 11300 bytes
font_01_sfnt_off0001c3b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C3B9 16792 bytes
font_02_sfnt_off0001dbcb.bin
4438abbeec3e8c0f2cfbfefa2ba054b710b998fb20fb2ccec83a201aae4338dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBCB 17056 bytes