Malicious PDF — malware analysis report

Static analysis result for SHA-256 da3a45b8039183a1…

MALICIOUS

PDF

78.3 KB Created: 2021-03-02 07:04:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a21a7928cd6386676ec719618c5a2187 SHA-1: 1ac9d3021bb3fba3100f6ea45e1ff4889a57616c SHA-256: da3a45b8039183a1e9672244af7e9730e7eefd9978ed33b4101052dd5760bb2a
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. It contains a large number of external links, indicative of a link farm or phishing attempt. The document body, though heavily obfuscated, suggests a lure related to 'English grammar tenses in gujarati language pdf', which is likely a pretext to encourage users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://nipisod.ru/award?keyword=english+grammar+tenses+in+gujarati+language+pdf PDF link annotation
    • https://cdn.sqhk.co/gijesali/bWLgfii/80061547190.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_603d110493774.pdfIn PDF document text
    • http://nuveclovet.xyz/75177584529wiy5h.pdfIn PDF document text
    • http://legendnat.space/ancient_rome_a_new_history_david_potter4p3os.pdfIn PDF document text
    • http://optalpha.com/amd_radeon_hd_6700_driver_updatesr3f3h.pdfIn PDF document text
    • http://cg-designer.xyz/3391136033e3q96.pdfIn PDF document text
    • http://hd-cam-mirror-up1.club/29133355656ng7l1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496826/normal_600fd48cdb792.pdfIn PDF document text
    • https://vepufekuso.weebly.com/uploads/1/3/0/7/130775624/mexamiliwik-fibadoxijav-zinavif-nefef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_600e4623ef28d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488349/normal_5fecb14f9228a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/berobuzigaziwedezo.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/76783534178.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/78915234264.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/garepitujaxosesex.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/78229106834.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61C 5488 bytes
SHA-256: fc06b408758b4033989fca19372ed6ef4ef361d24f176da498a78d8106984f7b
font_01_sfnt_off000108a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A8 10300 bytes
SHA-256: 1f7eb7e0ea29db1fd2eac2a45356bc3f5d31b151f680f319b657cf79a3015d11

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