Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e515ebf6b77f140…

MALICIOUS

PDF

70.9 KB Created: 2021-02-26 07:26:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae458bc6b1e9058d4f0f5f88258631b0 SHA-1: f0072a9f8c9b1be0748b205e5aa997d620f84d23 SHA-256: 6e515ebf6b77f140d4457fc178c7d60afddfe13c29f2141b55b8909ad013b382
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9688

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://jottigo.ru/award?keyword=my+cloud+ex2+ultra+reset+admin+password
    • http://nubigawe.22web.org/anti_spyware_malware_free.pdf
    • http://wamuwosola.mygamesonline.org/essentials_of_statistics_for_the_behavioral_sciences_10th_edition_answer_key.pdf
    • http://likujamozajowu.22web.org/zodixesigobezixufevu.pdf
    • http://giwapozolaleg.mypressonline.com/kafezexit.pdf
    • http://wibagimapo.22web.org/facebook_ads_manager_for_pc.pdf
    • http://gojawufeki.getenjoyment.net/what_makes_an_argument_valid_in_logic.pdf
    • http://sigisuzuk.getenjoyment.net/how_to_rune_magic_knight.pdf
    • http://xafegadixugu.iblogger.org/5864425717.pdf
    • http://tinutig.22web.org/fofuxisuroto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://budekibume.epizy.com/guidestar_compensation_report.pdf
    • http://jogufek.epizy.com/sobovezi.pdf
    • http://xoxuvenopojox.rf.gd/9633632578.pdf
    • http://wikiwujekuloxok.rf.gd/tanaxuw.pdf
    • http://diribiboturo.epizy.com/7544419311.pdf
    • http://mutodilevo.epizy.com/10789615239.pdf
    • https://s3.amazonaws.com/rokuwapesu/adobe_lightroom_cc_mobile_presets_free.pdf
    • http://kopolug.myartsonline.com/63025645005.pdf
    • http://jebefufodapiwi.epizy.com/40980581837.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ac.bin
32cded908bdd5a2168536c0c5fab48d02ce9a5337ce54b19fd00f8734b17cd43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AC 5500 bytes
font_01_sfnt_off0000fb5f.bin
845964b7936771c42fc4eaa69de9e89037e622b4ac92e94dee00c92ab43fd376		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5F 10624 bytes

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