Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0b898aa66c79e3…

MALICIOUS

PDF

71.0 KB Created: 2021-02-23 06:25:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9c18302d357313f3eaf87874a559cf72 SHA-1: 7800d7ab01fd0787dbe8a5abaeccc86d05f6def2 SHA-256: 2f0b898aa66c79e3805474258852e8a60d7e3c050f0cc503afe715e7dcb2f535
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_CLICKFIX' heuristic confirms a social engineering attack where the document instructs the user to execute a command, likely to download and run a secondary payload. The embedded URLs suggest a phishing or scam attempt, with one URL pointing to a potential redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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
  • 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://druttle.ru/strik?utm_term=how+to+use+ds4windows PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456705/normal_5fc8691911066.pdfIn PDF document text
    • https://cdn.sqhk.co/soxoxefumuv/0jhgjhg/check_followers_and_unfollowers_on_instagram_online.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/iffYtZ1/neon_yellow_hockey_skate_laces.pdfIn PDF document text
    • http://titalat.iblogger.org/whatsapp_status_love_cartoon_video_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_60249267e4250.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375076/normal_60096d035c55e.pdfIn PDF document text
    • https://cdn.sqhk.co/vomawoko/ajg0pid/16281086334.pdfIn PDF document text
    • http://pugoposug.iblogger.org/english_dictionary_android_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391013/normal_5ffeb1c803e82.pdfIn PDF document text
    • http://bewudup.iblogger.org/endymion_deck_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484399/normal_600f44be06bef.pdfIn PDF document text
    • http://dukafufuxona.iblogger.org/caterpillar_annual_report_2007.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401519/normal_5ff923f687339.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujujum.epizy.com/tofiferemeponixasuraranoz.pdfIn PDF document text
    • http://kapizepaninufo.epizy.com/wow_vanilla_arms_warrior_leveling_guide.pdfIn PDF document text
    • http://besenasoxa.epizy.com/assassin_creed_identity_apk_2019.pdfIn PDF document text
    • http://vuwamim.rf.gd/yougov_polling_report.pdfIn PDF document text
    • http://kabewusibun.epizy.com/how_to_get_a_free_phone_with_metropcs.pdfIn PDF document text
    • http://zuriromaruwo.epizy.com/93171984113.pdfIn PDF document text
    • http://rowagaparik.rf.gd/blacksword_font_free.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_off0000db07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB07 4624 bytes
SHA-256: 71c02f6f65a206afc4cd1322dd6d03bf2a551fc1585ef6cbe6baca4ce87a0761
font_01_sfnt_off0000eaea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEA 10408 bytes
SHA-256: 00dfb7b103a17abeeef26c278556f6687974448ac47bdb7114ac108a92dbdcec

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