Malicious PDF — malware analysis report

Static analysis result for SHA-256 9daa7cf3711a7497…

MALICIOUS

PDF

112.7 KB Created: 2021-02-26 11:52:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a9e786fa8d2a1158adeda258b3ee93a3 SHA-1: 238239188ed7e4d7b03c1424e1e8eccc2438cdb1 SHA-256: 9daa7cf3711a749729b5c3252bbe79c3cea8ef8b23afec8e2e9e9b8a62dea69c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a heuristic firing for PDF_SEO_DISPOSABLE_LINK_FARM and an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading a malicious application. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/wix?keyword=showbox+apk+for+android+that+works PDF link annotation
    • https://cdn.sqhk.co/veletafi/Ghfu2jj/art_education_graduate_programs_pennsylvania.pdfIn PDF document text
    • http://winoraama.site/271225894146u97d.pdfIn PDF document text
    • https://cdn.sqhk.co/lizasizova/dJJaLKD/bad_day_quotes_for_her.pdfIn PDF document text
    • http://funseeds.site/rivokigo1x3yy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470677/normal_600175438e8a7.pdfIn PDF document text
    • https://cdn.sqhk.co/ketalidukepi/VtiFgij/76660885630.pdfIn PDF document text
    • https://cdn.sqhk.co/bepesewutu/2LdsSii/sports_clothes_store_near_me.pdfIn PDF document text
    • http://national-verifyteam.com/county_recorder_s_office_san_diego_birth_certificatezsnvk.pdfIn PDF document text
    • https://cdn.sqhk.co/bapulofuw/ghTxhgU/spot_it_splash_card_game.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/yLrii9e/brazil_football_world_cup_mascot.pdfIn PDF document text
    • https://cdn.sqhk.co/vufisolepu/jg4ggvl/modern_air_combat_team_match_gift_code.pdfIn PDF document text
    • http://alifan.store/old_arcade_boxing_game3koan.pdfIn PDF document text
    • https://cdn.sqhk.co/pugirunosamo/aTieGjh/botezosudenovajoron.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_601a015f1b4f5.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/hCFX8lN/cisco_webex_meetings.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/boolean_variable_in_cognos_report_studio.pdfIn PDF document text
    • http://tulawoz.rf.gd/ikea_bed_frame_with_storage_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/nemovenaseteduron.pdfIn PDF document text
    • http://vudemiziwifimo.epizy.com/guideposts_writing_contest_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/paper_bag_template_custom.pdfIn PDF document text
    • http://tubiruk.epizy.com/77366583181.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/rolejavisaxetuje.pdfIn PDF document text
    • http://nomapalugaji.epizy.com/vesorubagiporesapegi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E3E 9156 bytes
SHA-256: c32056a0c6fd0873c255321a8041f1953da36bbe88aeac0b831e4cc8d267770a
font_01_sfnt_off00017c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C25 5564 bytes
SHA-256: 80b2f490fc08db65f223634328248bcb398d4fdeef0c1dc9b873941a0b4620ec
font_02_sfnt_off00018f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F1B 11056 bytes
SHA-256: b5109f2d97e02a54925b76d7fa45ac93d47bd1a888123b30dd4c7964bbf9de31

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