Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ae1ddfc7bd8dd8…

MALICIOUS

PDF

74.2 KB Created: 2021-06-27 04:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20e8b8aa300b6d6f2acb34da58a68dc5 SHA-1: 6a9410244b39ab81ea7af3ed80b206102354aad4 SHA-256: 62ae1ddfc7bd8dd865574b0bf522bd5ee876a2c2c14959046249bf4d7ddff635
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://creativeindustries.ru/uploads/userfiles/file/56740345326.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/7abcf74b5417e26f9faf26172cbe7107/koteroxuragosilunoxezofiz.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a24e099041f---91332955372.pdf
    • http://bogelaipigeon.com/upload/file/womenasupubo.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160847243242c0---wilajajodedop.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/43077522a6525be650ec65e48305b983/gaweborox.pdf
    • http://maytinhtuyenquang.com/home/maytinhtuy/domains/maytinhtuyenquang.com/public_html/images/file/jusodafusubenoraxirofided.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/pq9ar7rfeesn9revq2qimefm2p/87044829983.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/ikdo0v71vbrpo1u2cng9iakj65/tepatijomubedurutesepab.pdf
    • https://ebooksweb.net/files/file/bujazonivezekudipuwa.pdf
    • http://coeb.eu/userfiles/files/pules.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/m1n09g8qtvms2ldrti3t7s3ufk/77515566482.pdf
    • https://pmms-online.com/assets/file/16629502036.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c9dbe7cdf0d---58423434564.pdf
    • https://budapestpainter.hu/ckfinder/userfiles/files/finuwobosezitak.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/00a89a41d1cd1e193fce9c2c913267a2/fojewenadaritaroj.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/8f59aa7c65acb1cd94f5c84587fcfcc7/62797946918.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42ad5194cf---58531434534.pdf
    • http://mfcwestenkwartier.nl/beta/userfiles/file/8391941599.pdf
    • http://kaztelcom.kz/ckfinder/userfiles/files/70078035262.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606e556e5a4d5---wudebolofawixabinukug.pdf
    • https://noriupapildu.lt/ckfinder/userfiles/files/nezodanigogoberavi.pdf
    • http://ausafe.net/images/art/files/dolazeb.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=can+you+put+a+link+in+a+pdf
    • 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_off0000c2df.bin
0c6b7de8bfc91909e1def810a316f1961e611cc459e8f175ae5763c2e50c5400
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DF 15920 bytes
font_01_sfnt_off0000ebfa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 16792 bytes
font_02_sfnt_off00010411.bin
43443648e63fcdcbebd827791c2e13c258c4c5f3609f3feb4a59e4e6c42961c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10411 10428 bytes