Malicious PDF — malware analysis report

Static analysis result for SHA-256 1edc698e5ad0a589…

MALICIOUS

PDF

95.4 KB Created: 2020-11-10 10:49:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 26e0d26ffb3442711ef8c2b6265ad8a7 SHA-1: 96be9fcccbf61a3eacaddb680f019b914a92ed3a SHA-256: 1edc698e5ad0a5891d3325824446a8b2dc000654bb06b04252781a64997e752f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/123?keyword=again+meaning+in+malayalam PDF link annotation
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/wipukipina.pdfIn PDF document text
    • https://palukenibimel.weebly.com/uploads/1/3/4/4/134401756/gijegulotufupibe.pdfIn PDF document text
    • https://vikuregarune.weebly.com/uploads/1/3/4/5/134577585/nigular.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_5f8b48f168d69.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/3361586.pdfIn PDF document text
    • https://fulojozizarotuv.weebly.com/uploads/1/3/4/3/134318677/bcf50322044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413712/normal_5f9b487e79044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415530/normal_5fa1162d2411b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5f941b3c37b88.pdfIn PDF document text
    • https://rofotemajanati.weebly.com/uploads/1/3/4/4/134497193/4065921.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fc2b7a5-cac1-4e20-84dc-18e64985565a/mefizobobolizenezakir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/378355af-6233-41e7-9f01-fa3f1e7d78f0/vector_mechanics_for_engineers_beer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda47c45-3ae4-49cc-8e5c-03832d661573/pukerutadut.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://scripts.sil.org/OFLIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F0 4444 bytes
SHA-256: 4f4222ca632f96c26d39c5a5dc28799a521c1bfdd1ceb5287a6114b5aef8a485
font_01_sfnt_off0000e994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE994 4820 bytes
SHA-256: 18702508aa1baae84aafbc3cca4a2e3d47bdf6d89dbaf9502d4225c6868000a7
font_02_sfnt_off0000f9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F1 10024 bytes
SHA-256: 41fda5d030015a07ed3b726008001e46f5688df9412e82cb6478ed0b5c419874
font_03_sfnt_off00011b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6D 7276 bytes
SHA-256: 1fee623fdf28f5225d5e0a42adc79cc9cf507b838ea0720fff231236d29ee367
font_04_sfnt_off00012eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEB 12920 bytes
SHA-256: fcf8e379e7d905211249929dcd2fb99345d67d30058f1bf31de2ce885cd968b4
font_05_sfnt_off00015848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15848 16492 bytes
SHA-256: d961438e6c7cbc47dc4bbd484d0aff6270473be93d9cc6c25a39d9d988ba100c