Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d3abc4b4d7f5fd…

MALICIOUS

PDF

91.4 KB Created: 2021-09-12 18:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 03f7f4b4fb5973336df43e288dc137c9 SHA-1: ff4bc22d488746688bd67044b7c88ffa85ffb185 SHA-256: d8d3abc4b4d7f5fd7a7fa2ce05dae01e51d4c9e48aa3a7095a6604847639f09d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of link farms on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of these links suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://tucarrorentacar.co/ckfinder/userfiles/files/sofagujamopojabefusubeva.pdf In PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/61298271200.pdfIn PDF document text
    • https://kamionosnyelvlecke.hu/userfiles/file/vinilerufebefax.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/cdca782f1da9356dddb324763fffec0b/kixadixo.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/duluvegalolalipazazu.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/65301202694.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/xuxanemutamapuso.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/42933924789.pdfIn PDF document text
    • http://keacg.com/upload/files/24460170018.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/novivimovijap.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161320b993dd33---zepoxejusegopanomosa.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/xerumijejivuxewoxiwepolu.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/77846040155.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/48202371267.pdfIn PDF document text
    • https://gangnampools.com/contents/files/96782823492.pdfIn PDF document text
    • https://eurochen.com/UpFiles/WebEditorFiles/file/83994132903.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021091116082598.pdfIn PDF document text
    • http://mcserpenti.com/userfiles/file/fivel.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/56990a1b518f99c2ba092a56e952addc/69768963796.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/99994829095.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/b96de0c4cc8c7629721df61a449e79b9/2437357260.pdfIn PDF document text
    • http://taxfreepoint.com/file/54275817829.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/mewagakepulose.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=boku+no+hero+season+5+ep+12PDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB1 16104 bytes
SHA-256: f06cddf61c9925e39e47a8b8d88d5d2c108808d867bf63b528aab798a6fb49b7
font_01_sfnt_off0000f107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF107 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001091e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091E 10664 bytes
SHA-256: 12111636c7c98d44cc4b290fcc880d80e3951c5384d119f08d12bd63d439fce7
font_03_sfnt_off000121a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A0 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_04_sfnt_off00012998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12998 20576 bytes
SHA-256: e965b1c15896c5d3adf9aab96c82da080f83f842321c2b528b97247a185629f7

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