Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d190af1662084d…

MALICIOUS

PDF

89.3 KB Created: 2021-06-25 23:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c8a999abfa777b811214c71aa8e0938c SHA-1: 74742884002897cadedded44fa3a597d63799adb SHA-256: 32d190af1662084d546bbe65070360ee8b9f8034d7107f99be0338938254b14c
196 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing attack. The document likely attempts to trick users into downloading a payload by masquerading as a Windows 7 update, as suggested by the URL containing 'download windows 7 ultimate 32 bit updates manually'. The presence of numerous links to compromised CMS uploads and disposable hosting further supports a malicious intent to distribute malware or conduct phishing. No scripts were extracted, but the overall structure and URL patterns indicate a social engineering attempt to execute a malicious file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://inwebjor.ru/uplcv?utm_term=download+windows+7+ultimate+32+bit+updates+manually PDF link annotation
    • http://dalnoboy.net/data/filestorage/upload/files/25502226838.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/taletukeji.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad5427ef1c---75040844336.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/13cde2dab8ad2a8072c12a0053430c85/49563016119.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/guziz.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1a5106d67---29300924225.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/nevaxojizatanow.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/bupiribakoki.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/ae79f66b94a8f18580367db3e7b94e82/36646756743.pdfIn PDF document text
    • http://sushi-belovo.ru/files/72081814607.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04995b3110---80431364497.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/72925658397.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/477dfe5827a3bf4a4b7782623a1a9c16/jesase.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071ecf9c5dbf---44560461085.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/34035507403.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f5749a763---rogenusen.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bda04eb026---sisoze.pdfIn PDF document text
    • http://alkanboya.com/files/file///pumuliturijovedig.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/xafiladilo.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/45939130970.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a28dfb7a76b---zelesepo.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/d11e69058ce926ff80a4744f2c322943/38078822407.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/xogaziz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF760 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F72 17400 bytes
SHA-256: 3202f5b5661beec95d30dd3b5007f735ca22e8b53500c13b42cae98e67d1b28f
font_02_sfnt_off00013d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D40 11236 bytes
SHA-256: 8b38de9c9f9e4a4c0991c0482890d914868403f79017968e54273b811ea0020b

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