Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22d8b4d7e49002c…

MALICIOUS

PDF

66.3 KB Created: 2021-03-23 13:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1fa893bc56ac0b294a274266f6976ef SHA-1: 75d4e45f492e9d64b793833375b5e2c1d3298771 SHA-256: a22d8b4d7e49002c7ea9ef824f8b8d35fa12532611732115bcf477618b9b63a8
176 Risk Score

Malware Insights

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

The file is a PDF that contains multiple suspicious links, including one that is invisible and points to a domain commonly associated with phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to trick users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://golowaki.ru/wix?keyword=ever+fallen+in+love+tab+pdf
    • http://abzac.me/chinese_auction_ticket_sheetsck0rm.pdf
    • http://telemprom.xyz/how_much_does_water_softener_service_costop8vu.pdf
    • https://cdn.sqhk.co/janezewufaj/jjeigij/86866145153.pdf
    • https://cdn-cms.f-static.net/uploads/4381766/normal_601a9e651b2d5.pdf
    • http://winfreeiphone.xyz/28505810659a5zz8.pdf
    • http://buvemalo.66ghz.com/between_the_sheets_linen_spray.pdf
    • http://sks-expertiza.ru/td_ameritrade_thinkorswim_platform_downloadhdx38.pdf
    • https://cdn-cms.f-static.net/uploads/4381085/normal_60335a9f3be14.pdf
    • https://cdn.sqhk.co/puwidebudojo/eRRdGme/my_vida_tv_ronald_moscoso.pdf
    • https://cdn-cms.f-static.net/uploads/4381997/normal_6052cf13aba91.pdf
    • http://naxiramomamaz.66ghz.com/80232614957.pdf
    • https://cdn.sqhk.co/wovupeni/BdgdCUc/moto_g_power_specs_verizon.pdf
    • http://loginwithfb.site/nokujikapekipazumunowut5mk4f.pdf
    • https://static.s123-cdn-static.com/uploads/4368468/normal_5fefd6df6e93b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dupofax.rf.gd/72853903861.pdf
    • http://wezebiwudure.epizy.com/tavajarovupiz.pdf
    • http://zarevarepi.epizy.com/rscit_result_2019_september_answer_key.pdf
    • http://waxusumuguk.epizy.com/89609429009.pdf
    • http://puravusixatix.epizy.com/craftsman_snowblower_troubleshooting_guide.pdf
    • http://kurejewupom.rf.gd/33184743692.pdf
    • http://limekukojaso.epizy.com/army_command_policy_study_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c65a.bin
160655b0965618e145a59a2564791e6a9cdbac969da2ad17fd77153a1d0139ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC65A 5016 bytes
font_01_sfnt_off0000d778.bin
1c2f811cbb719c821cf5dc1d27a9df912ef00368f670b3d099563b009705284e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD778 10880 bytes

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