Malicious PDF — malware analysis report

Static analysis result for SHA-256 573374c8d228a8ad…

MALICIOUS

PDF

78.4 KB Created: 2021-04-05 18:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b2efcec27416206a2f5c2dab27e236b7 SHA-1: 3150cdd471d44cbf34ca9da7071137eb9d8e1975 SHA-256: 573374c8d228a8ad70670f33bc3a911809a8ea5194b05dc23896bf6e1f6b8783
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, which is likely a lure for phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the presence of external URIs suggests a potential download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://nipisod.ru/award?keyword=cake+design+book+pdf PDF link annotation
    • https://cdn.sqhk.co/bigulikexupa/ehfThbr/kitty_running_away.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/eDJih8g/logagi.pdfIn PDF document text
    • http://cccckkkkkdd.space/43031791009gxfci.pdfIn PDF document text
    • https://cdn.sqhk.co/telazaje/YhdsPhb/how_to_make_knives_sharper.pdfIn PDF document text
    • http://yblda.fun/bugaboo_cameleon_seat_manualu26j1.pdfIn PDF document text
    • http://magic-spring.com/jonariboe9qxh.pdfIn PDF document text
    • http://fortuneo.biz/is_there_a_season_2_of_the_alienistar7lj.pdfIn PDF document text
    • http://shoop-ff.ru/luzaluzijaxasbwwhm.pdfIn PDF document text
    • http://tuimag.ru/saxogigumiwube1g300.pdfIn PDF document text
    • http://nanolenka.xyz/final_fantasy_14_summoner_guidem6ft3.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/aVSic03/talowufukexuluzige.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/fiiiceA/ball_smasher_max_upgrades.pdfIn PDF document text
    • http://xakijukofe.iblogger.org/acr_guidelines_for_renal_ultrasound.pdfIn PDF document text
    • http://profyhouse.ru/vowinosuzemwuk2k.pdfIn PDF document text
    • http://microdigitalmeter.xyz/3927185460klr55.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/jewizopukuni/mercruiser_3.0_engine_oil_type.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/vexopujuvigubavaf.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/st_cuthbert_mayne_hemel_ofsted_report.pdfIn PDF document text
    • http://kepozajadog.rf.gd/small_converter_to_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/free_sheet_music_for_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/18390231412.pdfIn PDF document text
    • http://barivigafijamub.epizy.com/34132058690.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/12789731558.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/nazim_hikmet_poems_english_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/organic_cotton_flannel_crib_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/new_nintendo_switch_games_coming_in_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/sigezudebubebofuri.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C4 5188 bytes
SHA-256: a435e862a1f6beed2c619a711781aeb0fcb487acb610f0a942ed8653ee195a4c
font_01_sfnt_off0000f27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27C 10368 bytes
SHA-256: a89ab576b3d686a88b8025b9f79beb0dec94d5a293db17aba683cf35ca6283fe
font_02_sfnt_off0001164b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164B 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b

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