Malicious PDF — malware analysis report

Static analysis result for SHA-256 1afe6bf07f7a38ed…

MALICIOUS

PDF

87.6 KB Created: 2021-07-01 19:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 31d2d4ebd0fdfedb20b15502c6003994 SHA-1: b05fd724bc9d12976963ad30b5201f9a01dfaad4 SHA-256: 1afe6bf07f7a38edcb60ae93a62d9f3f4a58c100575efa6b7364f44b4d9d006c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous external URLs pointing to potentially compromised websites and disposable hosting. The presence of embedded URLs and the overall structure suggest an attempt to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://laborke.ru/uplcv?utm_term=civil+rights+act+of+1965 PDF link annotation
    • http://albatrossmrn.com/konadnew/userfiles/file/xapagowerudumofe.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/87574766958.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/urji4cath2phngjrl3clavis4c/jakuvunutajima.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/kujerememefitoz.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/63d409e7a8fecf7b8e4790d49a5f59db/5536413936.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/18511146140.pdfIn PDF document text
    • http://0851gay.org/userfiles/202106file/2021061807103870554.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608781a3235dd---7279253630.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/c7b4a30712a9476d425671340434567e/pazanimimabasetuxegura.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/xexulasigimogofef.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f432e0c9f---megusifuni.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2a5496f05---denuwiliza.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4369b7114---kavidusare.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/4a1a2fa0d395168aad23c09de78af9ef/wijam.pdfIn PDF document text
    • https://vvpta-irvine.org/userfiles/file/zelet.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/nogibetinakafugoga.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/62005087.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/nufukof.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ad5775781---fixam.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/najurozonodevulubegav.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/norubotus.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/cf4c9d2f9c6b7f162db135d0066d7683/karom.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/13930078242.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_off0000f294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF294 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA6 17056 bytes
SHA-256: cc2d60548bf523c687f0acdd64cd4734576ff4fd5e4f8ac14ccb96f74ab30693
font_02_sfnt_off00013756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13756 10996 bytes
SHA-256: b4d5f13b97ba9fc26e5ab5500aef4f6b4a4815b431285762cd8b6743a41af202

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