Malicious PDF — malware analysis report

Static analysis result for SHA-256 2613e8f8b7e077aa…

MALICIOUS

PDF

91.4 KB Created: 2021-06-28 02:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: dd830509a173d1f1a803b1553cd7cf9c SHA-1: c2f1cf3978d4e88debe05d3542541ff2ab6c6e03 SHA-256: 2613e8f8b7e077aa902597ff8c5f9efe34d81c8a348e7ca1733378e3feeb5771
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites through a link farm. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific user-facing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://vector-luczak.pl/new/fck_user_files/file/tuxatiwataveginutew.pdf In PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4b8d6ce83---fijizutegaravofa.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/semuxetaneguzenapava.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///marafadol.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/kunodofowomirogisazufi.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/30965730436.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/48179935164.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/gatilisodadodovarajiderub.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/dodap.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/540609a1d7e077475be42ce9fa2ba767/29351788228.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/wawivedasuzedinepamapad.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/pevebez.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/2akqm0219qj6gctncklqgagev6/54074620747.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/zomabepevonobaripanomip.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942f817b292---jimebakamepizupose.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ddvmmkckiqspqavcp849qvqjho/dowasefelilaxema.pdfIn PDF document text
    • http://ciskmv.com/css/file/xidaxipomusitidojovotefe.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/tezudax.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/27537517983.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8deed28937---teredujilukexolewo.pdfIn PDF document text
    • http://cepsagibyachtfuels.com/images/photos/8658673995.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b944bc0626---domofamotenemimod.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160924047baf5b---mubotowunejobavulaxexex.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608706721eac0---89655444473.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/ed7dd30a53aee8e82ce1161270bf9880/komexamajal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=nothing+but+the+blood+piano+chordsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE831 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10043 18396 bytes
SHA-256: 10cda1375d7106fc39db739bf384e750bfe8f789806a3d2679dd5208e73bde99
font_02_sfnt_off00013078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13078 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_03_sfnt_off00014684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14684 11008 bytes
SHA-256: c6a9f6ef3861fcd2e1722d47aa8c34c6bd266e1021c93fc3043941c2655b101b

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