Malicious PDF — malware analysis report

Static analysis result for SHA-256 305dfcdd442e5aff…

MALICIOUS

PDF

114.2 KB Created: 2021-07-17 06:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4405ed0c36960524340e0faf97f0b121 SHA-1: 3287834d481cbd198a16851f49064af352f68564 SHA-256: 305dfcdd442e5afff9d6cfb88026dd54a9ba5dd0638313d202bf894ae32b3cfa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, specifically within the Formcraft plugin's file upload directory. This suggests a phishing or malware distribution campaign where the document acts as a lure. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

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://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dc9f024620f---kirimekagiref.pdf In PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe56456531---xeduvakoferotibes.pdfIn PDF document text
    • https://ntc-container.com/upload/files/30184592037.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/1b9ee0f5e61dcd82c0b47335e3d70390/19574564231.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f56143f138---jemisakizojufijuxoxegik.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082f22274843---56357048008.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6907f37b86---86170973165.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/kososopolevawukazew.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/66432222671.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/90818094858.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/subitisowuborujixun.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078dc717925a---razidadavarofop.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/80094099185.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/3505600628.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/1bb33ea77da727099783446982e57e97/50351061436.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2f6337f5d---lozotemazudixoxigipuno.pdfIn PDF document text
    • http://inlygiaylynhua.com/upload/files/labanojekoxi.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160aa16211290e---juwopexozujule.pdfIn PDF document text
    • http://transinfosoft.com/userfiles/file/duzojomejelugiritazar.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/d0489b467e91b959e324b16b8a7393c3/33045517828.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fd423b1e5---bejowijepi.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0cd0539f8---darorugenigatimop.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b0eaf30a5ff---96997495763.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=art+in+iron+and+steel+reading+answerPDF 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
stream_004_off00017657.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17657 16452 bytes
SHA-256: 2c0f76aae7f2fe5ac7a2697c70de47622785fc7f8e2af75b47080cf2c16fc031
font_00_sfnt_off00014671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14671 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E88 10488 bytes
SHA-256: eafc2602edf0447154c27fe53722b7191b63709c3a5558a1dafe2a5445dbb878
font_03_sfnt_off00018d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D22 17832 bytes
SHA-256: f664b72673cafcb513b05470867283d11c4baebc6a95f5002778623093179afc

Open this report in the interactive analyzer, or submit your own file for analysis.