Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1579a6aa3b325d3…

MALICIOUS

PDF

89.3 KB Created: 2021-03-12 04:33:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ffc97f3fa6fedb6f86903867d623861b SHA-1: 49c09793ff71548e4f93b6459297f017a14b7d9c SHA-256: c1579a6aa3b325d37875099461c6ee558a0914e51fedad81a5e74a310de139dd
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site for further exploitation. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though partially garbled, contains keywords related to learning Korean, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/123?utm_term=learn+korean+fast+free PDF link annotation
    • http://usacreditcheck.info/anthony_joshua_fight_videowq2a9.pdfIn PDF document text
    • https://borerejo.weebly.com/uploads/1/3/4/0/134040615/1215351.pdfIn PDF document text
    • http://govnososal.xyz/applied_research_studyowpqy.pdfIn PDF document text
    • http://golosa-spasibo.ru/under_pressure_queen_sheet_musickdwpo.pdfIn PDF document text
    • http://mybestchan.online/arduino_uno_software_pwmhxwa0.pdfIn PDF document text
    • http://grenkasalo4.xyz/626612692987zuqo.pdfIn PDF document text
    • https://zatikavetix.weebly.com/uploads/1/3/2/3/132303242/5357bf9febef04f.pdfIn PDF document text
    • https://lisufijefe.weebly.com/uploads/1/3/2/7/132740260/ruzivejovi_puwifek_jugilipobapi_mixotomopowib.pdfIn PDF document text
    • http://hyipinvest.site/6138498527fnxsk.pdfIn PDF document text
    • http://avit0.pro/denon_avr-2113_netzwerk_hdmi_av_receiverouddw.pdfIn PDF document text
    • https://pitidupokeni.weebly.com/uploads/1/3/4/4/134485339/7a5c80e72e18bed.pdfIn PDF document text
    • https://kusuxifitumaka.weebly.com/uploads/1/3/4/5/134593182/roxobanaxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://diselukuxena.rf.gd/eyes_the_horror_game_aptoide.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/alternance_dveloppeur_informatique_ile_de_france.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/311a42a3-14dc-49e8-9110-b90f74ada5c9/how_to_knit_entrelac_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/ti-30xa_negative_exponents.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/45431183386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bf44e1a-cc9b-4ccb-81ea-a422f16d4f35/jump_force_tier_list_hiei.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/17273708272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1756f7ae-b298-4d02-a406-6698aa0ecfc8/guitar_chords_for_hindi_songs_in_sa_re_ga_ma.pdfIn PDF document text
    • http://pupenedu.rf.gd/kakodoguvexaxim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab9419a-f9b3-4abb-8cef-b40298e1511a/fasubesono.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/how_many_calories_and_carbs_in_wendys_nuggets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e948b13c-0e0d-44e3-bae8-70cfeefbd65f/apc_back-ups_rs_500_battery_price.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C1 3944 bytes
SHA-256: 8760c0bc7e8f2c234278f7d88f02ca68e8eb501bed258fc754ee04e0e4c673d2
font_01_sfnt_off000107b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B9 4732 bytes
SHA-256: b6b865cc0dde26d8aca5fc50fd31d59d145354d2b1727f21e21d24f8264b79ec
font_02_sfnt_off000117eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EB 12528 bytes
SHA-256: e5d3b8f08136f235dd73058b992bbf99a3c4fc74868577785008e293e6ada2ed
font_03_sfnt_off000141a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A8 16164 bytes
SHA-256: 4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349

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