Malicious PDF — malware analysis report

Static analysis result for SHA-256 e544203c6091402e…

MALICIOUS

PDF

79.0 KB Created: 2021-05-19 02:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94331c5b8ecfa854f42f9c7dcc3b8dec SHA-1: bdd954e9007047b6916ddc0936ea1c19c825221f SHA-256: e544203c6091402e7194417df3027aee40346886a6987e219f197aeaa9b5a450
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, suggesting a link farm or distribution mechanism. The embedded URL 'https://jumiwimov.ru/strik?utm_term=4k+ultra+hd+movies+download' is the primary indicator of the lure used to attract victims. No scripts were extracted, but the PDF structure and numerous external links point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=4k+ultra+hd+movies+download
    • https://zefinefan.weebly.com/uploads/1/3/2/8/132816158/0109d00e.pdf
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/549a2a90f909c.pdf
    • http://padaxopawudu.iblogger.org/vupepufiwosubodumazeso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/25acf570-7099-45b2-a221-25df5caa09c1/donavanosabenunun.pdf
    • http://gataton.rf.gd/75439221272.pdf
    • https://uploads.strikinglycdn.com/files/d9dc1a9a-790d-4305-897f-d6ee4bff99a0/tizimofidekedewijureme.pdf
    • http://badugumafuzalij.rf.gd/dovuxamuwitajoxapepo.pdf
    • http://jupejorix.epizy.com/chhota_bheem_full_movie.pdf
    • https://uploads.strikinglycdn.com/files/4aa09f44-329c-480f-abdf-d85fd81a129a/how_do_you_count_by_sevens.pdf
    • http://labaxufosegu.epizy.com/82923233610.pdf
    • http://dizogusuvi.rf.gd/34823672738.pdf
    • http://xavemiwikujuxuk.rf.gd/how_long_do_you_cook_ribs_in_a_pressure_cooker.pdf
    • https://uploads.strikinglycdn.com/files/0c94a7b9-dc6a-4ef8-a250-1da130be07a9/doniruzo.pdf
    • https://uploads.strikinglycdn.com/files/03a6e4c8-ef9d-4ff8-865e-c0ca511a4fb0/pavexuj.pdf
    • http://potubavaziripek.epizy.com/diablo_3_farming_guide_2019.pdf
    • https://uploads.strikinglycdn.com/files/d6185fb9-613b-4295-988a-55fb728cc1bc/nonosoja.pdf
    • http://tenavugonotaj.rf.gd/brilliant_legacy_sub_indonesia.pdf
    • http://gusubozavagu.epizy.com/pitabimolezenuwumar.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e990.bin
ed2122d224a99fb6b61493db4f5a407e1b2c9f9d1a07794bad85dfd08cfea5e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE990 5156 bytes
font_01_sfnt_off0000fb02.bin
865696a33bc97fb0b946b48aaa70e7b810585ee7f9949d80d2d466cfa1d954e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 11168 bytes
font_02_sfnt_off000120a8.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120A8 4324 bytes

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