Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc3287b5ed438c1…

MALICIOUS

PDF

76.6 KB Created: 2021-03-07 18:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7226c1469a52b76db94d2ae20c5ad8bb SHA-1: f68a7fec453460b5d3360977d1a9a0582befd637 SHA-256: 2cc3287b5ed438c10e7e69046eee63c999791ab73be89737bf7123e68a609792
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically linking to a "free canon pixma mg3520 printer driver download". This URL, along with others identified as part of a link farm on disposable hosting, strongly suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the PDF, likely serving as a lure for users to download a malicious payload.

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 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://jottigo.ru/strik?utm_term=free+canon+pixma+mg3520+printer+driver+download PDF link annotation
    • https://cdn.sqhk.co/pasezateda/amjbibC/stronghold_a_hero_s_fate_guide.pdfIn PDF document text
    • http://gratoraama.website/42076291328btvcy.pdfIn PDF document text
    • https://cdn.sqhk.co/rurizibaxami/KidWWiE/unofficial_tips_for_resident_evil_3_resistance.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/fojeujj/xudodadivoko.pdfIn PDF document text
    • http://fejixisuburuza.22web.org/yamaha_rx-v473_av-receiver_test.pdfIn PDF document text
    • http://esclub.info/ambledown_gap_cover_claim_form_2017yyq24.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gotikomerutoj.rf.gd/annual_report_vingroup.pdfIn PDF document text
    • http://kisetifanuxutol.epizy.com/level_1_antiterrorism_training_post_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/747bea39-6be4-4b35-ab53-0fb01036e747/matlab_for_neuroscientists_free_download.pdfIn PDF document text
    • http://sezeludijufoma.epizy.com/business_training_flyer_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/30270969810.pdfIn PDF document text
    • http://wubuxosivukip.epizy.com/61453963218.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/social_media_strategy_ppt_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa1cde8-bdef-4bf5-b635-16a1fe124ba9/piruzavap.pdfIn PDF document text
    • http://kefebewo.rf.gd/sigofosuton.pdfIn PDF document text
    • http://bividit.rf.gd/game_center_para_android.pdfIn PDF document text
    • http://jifafir.epizy.com/laserjet_m1212nf_mfp_drivers_download.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_off0000eb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8C 5952 bytes
SHA-256: f4af778b9bc82c173b3fa881c821c724dcd8d27f03e384553c9e3736d3cefbce
font_01_sfnt_off0000ffe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE2 10776 bytes
SHA-256: 138707f779a5df4bcd1a320efc4c5188511f3f5f2fd3c1b0254058dc69662529

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