Malicious PDF — malware analysis report

Static analysis result for SHA-256 0724ee8f8ce234d2…

MALICIOUS

PDF

87.3 KB Created: 2021-06-28 22:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: da30b867f04f5cac3f20b39e799448fb SHA-1: f0bdc781867c2983e6b0a14c69698f71b2b3661f SHA-256: 0724ee8f8ce234d2de498e9523959970faf8245e088c9f3d0b6558163802221e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links likely serve as a lure to direct users to phishing pages or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a0645b87f---deloxozo.pdf In PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/23c8f90baae2ffbed4a6096950eed9f7/pirisekimimulo.pdfIn PDF document text
    • https://avenue102.com/uploads/file/jiwupameposepumos.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a615b831d2c---ritutimilu.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/9d81185556f589862b1d2989b046048c/67072501511.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c18bedd9a34---zezotez.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade0933faa5---44111009367.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/98912085315.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/1eabbcf4cd292018acd9c9d9638bb3ad/91933079864.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/j1p3qir6gqm73f0ffarkdgcd44/simabudi.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/d7d4f86de2209669d3c79ba38757b123/zogikorudi.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/nelutufirafevepode.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/bdd4b2e920a2c3b5a5b268aa8e8125b8/98740388474.pdfIn PDF document text
    • http://indecomavo.pl/inc/17825793522.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/boxutabesokob.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4d2161131---ziwolotowed.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/a6a774c18172da10149ddff42753159b/25363273421.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/35953817467.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160983d803cd14---3471943134.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/2bcj6vbegfh0e5d1alpn1oknsi/20192097618.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/44814152019.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607747436cc52---wazudowixaxiserig.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/711f2c04d9a5edf95f7617b84e41f1ba/ripogudubogowexenikamevax.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a91a5016c5e---50580984591.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=black+characters+in+fighting+gamesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CF 18464 bytes
SHA-256: 7aea7ecbc4ddb43df6a84c4a57edcb2e111c9f81e589e2736e40f7ec86a488eb
font_01_sfnt_off00011456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11456 2316 bytes
SHA-256: 1adb350770246fe5f85c628edd2898fb4225a8f2ed59cd50c5be1403d2c9de64
font_02_sfnt_off00011e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E93 10808 bytes
SHA-256: a80d5647ea51aeb2f939f0d5c37a1d33fa227a7c2d5f84984159097ec2078518
font_03_sfnt_off00013756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13756 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1