Malicious PDF — malware analysis report

Static analysis result for SHA-256 803af61718732263…

MALICIOUS

PDF

81.9 KB Created: 2021-02-16 05:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 820354b20debd6db9e1fd568d78ac773 SHA-1: 7a9843e0ad84b1b94f6803002d6d6ffd2062ba14 SHA-256: 803af61718732263d3989263b48c287b17bf96cd10bc03abb1ade10c7d5359a2
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm, with one prominent URL pointing to a potential phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to a "Xotic ep booster clone kit", suggesting a lure for users interested in such products.

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://baarspo.ru/strik?utm_term=xotic+ep+booster+clone+kit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486563/normal_5fe80e0d8bd41.pdfIn PDF document text
    • http://tonerinkstore.com/551323862816vqhe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469349/normal_5ffd6fc15fa79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473947/normal_5fdd9ae722f35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475380/normal_5fcbfe8ed9d6c.pdfIn PDF document text
    • http://stepka2016.xyz/diablo_3_season_14_barb_guidenjyjq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479933/normal_60229fd81aa11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_600cab1df35b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461777/normal_5fec6dc5ae4fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443598/normal_5fc9402807c98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469135/normal_600ce4112a2bf.pdfIn PDF document text
    • https://mumilupoj.weebly.com/uploads/1/3/5/3/135351188/c74cdf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426425/normal_6018d67a86b26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baguzakanaso.epizy.com/assamese_whatsapp_status_new_video.pdfIn PDF document text
    • http://ganusigesu.rf.gd/medialink_router_login_admin.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001111f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1111F 23592 bytes
SHA-256: 44df8c9d7846d14bb014de366119307ae8de541da2e38553d3cb86b4b67da4a1
font_00_sfnt_off0000d962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD962 4896 bytes
SHA-256: 5897ad0af9ff20f5f2da50813fdeeb45f66df77c316a323043bf9379e07b0600
font_01_sfnt_off0000ea16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA16 12256 bytes
SHA-256: 3ff83c302d8d1f90c12a9fb19584e96a3c180b119bd3cb1477419b592f4dab61

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