Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ae70b74c18b0b5…

MALICIOUS

PDF

71.7 KB Created: 2021-09-14 06:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e7385769e1700c6601beb68415b691dc SHA-1: 60b109fad354d0492fca84a9d06d84feca77c1d2 SHA-256: a4ae70b74c18b0b514b82b144ce76251c01f3da9859d4d36c034130ac65479af
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting an attempt to distribute further malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://tianfonmm.com/d/files/81510851319.pdf In PDF document text
    • https://bitree.com/ckfinder/userfiles/files/721596830.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c2eb88a68---suxuzipifititefoduto.pdfIn PDF document text
    • https://cukimentescukraszda.hu/files/files/80643093983.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/f8bd672ac11972b8517fdd61768dac2a/93215122682.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/59657737712.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/35633184722.pdfIn PDF document text
    • https://billard-hauri.ch/userfiles/file/xitenozirajifad.pdfIn PDF document text
    • http://biosite.ru/images/news/file/90265456402.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/kaguz.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/76859074090.pdfIn PDF document text
    • http://nfc.soo.jp/file/manunebovovun.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/xetexusilagu.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/kipiwot.pdfIn PDF document text
    • http://nscenter.cn/upload/files/vowasi.pdfIn PDF document text
    • http://hasanmasat.com/ckfinder/userfiles/files/86395406578.pdfIn PDF document text
    • https://rotitelor.com/contents/files/dadozaxokevitibevinobax.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/202194411517572.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/b24eed42b006fd4ecb184af310d3b09c/rogoti.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/34293251852.pdfIn PDF document text
    • http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/jijedijusoraxibamatobu.pdfIn PDF document text
    • https://dalba.net/other_files/File/duziwetavoje.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/61402306064.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346c8bc2c6d---bovivaxowe.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/554d6ad091ed7136fec4313a850e4146/90988838993.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=50+shades+darker+putlockerPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE3 10764 bytes
SHA-256: 8b8005ecdcba9f878415d9805225173d00a9c334bfce7b4223201e03da745594
font_02_sfnt_off0000e7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DB 16180 bytes
SHA-256: 101ca62b410efb016c994388dbc20f862676d892e662e8918479fb53f20f86ed

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