Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad6a44a976fdc84…

MALICIOUS

PDF

73.5 KB Created: 2021-06-25 17:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64440fa8a63219bd45054532e1832035 SHA-1: 4aa542461c0056288b91d0f4f2c360eeef7f46bf SHA-256: fad6a44a976fdc842e113278eba9bceadf76e940bccd89b9a3c8ead5f1eab287
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload directories and other disposable hosting sites. These links likely serve as a distribution point for further malicious content, such as phishing pages or malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://immobilgold.com/file/95975058004.pdf
    • http://web68s.com/upload/files/11556826271.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607273d9b1fcb---fikebarurutufezifeme.pdf
    • https://sankohomestay.com/userfiles/files/jebefebomebunotebatem.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c220580b9a8---penabiguzudakawiwus.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/nibudolalategudup.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/a6597fdc367127e36372e0d427d7cfdb/1913927259.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a6f0495e6---74809903748.pdf
    • https://aawyx.com/sites/default/imageuser/file/gakivisivujog.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/f01b660a97e7c40740a2382612a71288/33841469190.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9ffe25480---tepiramenuropij.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc6563131a---xavafiruwakirezifuzupa.pdf
    • http://kulturazebrak.cz/userfiles/degawufivoni.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/0fd5a7cba50c7b10ddea2c074a379873/66066363264.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a87fff2a5b2---52111396651.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=psychology+of+education+pdf+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc2f.bin
177bffa3db9abdea8e2ccb2ef7a8c032ffbc7a68e1dfd34628620c518aa6ec7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC2F 17068 bytes
font_01_sfnt_off0000e768.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE768 16792 bytes
font_02_sfnt_off0000ff7f.bin
a63daad76d40ed45d30d7d2b38cfd84a8049ab8718052c2f78ec62e4581cefc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7F 11100 bytes

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