Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec445076cc3b846f…

MALICIOUS

PDF

73.1 KB Created: 2021-05-04 06:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 90c979a8043f0305894ce66d819105ce SHA-1: bf99219813c5adc651c4b6c76d729f018a58319a SHA-256: ec445076cc3b846f504f0bd8851c2e59f09e5e565b266ce3150b6bd54f1daf78
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL `https://golowaki.ru/strik?utm_term=manual+impressora+hp+deskjet+f4580` suggests a phishing or malware distribution attempt, disguised as a printer manual. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=manual+impressora+hp+deskjet+f4580 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470385/normal_600ff4f8e52d6.pdfIn PDF document text
    • http://fuwiduwoxobol.mygamesonline.org/37814684839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459937/normal_6055b10e22301.pdfIn PDF document text
    • https://sesuxaned.weebly.com/uploads/1/3/5/3/135349378/dudolepe.pdfIn PDF document text
    • https://medofigovur.weebly.com/uploads/1/3/5/3/135316586/861183.pdfIn PDF document text
    • http://xixizugujixu.iblogger.org/fact_family_house_worksheet.pdfIn PDF document text
    • http://geekcods.com/film_avatar_20107ztam.pdfIn PDF document text
    • http://itawegan.space/cbs_radio_mystery_theatre_episode_guideflahr.pdfIn PDF document text
    • https://famutogerene.weebly.com/uploads/1/3/4/6/134688643/zumeguke_vigewap_wenebonim_wogimod.pdfIn PDF document text
    • http://creamwalls.online/is_ghost_gonna_be_in_power_book_25cm7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_604921bb4bd99.pdfIn PDF document text
    • https://lepasedesefin.weebly.com/uploads/1/3/4/6/134625589/deber.pdfIn PDF document text
    • https://jedurabononip.weebly.com/uploads/1/3/1/4/131453193/3d7c2b.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/zozuxukoxo/defense_mechanisms_worksheet_addiction.pdfIn PDF document text
    • http://vujomafo.epizy.com/nabupogukofetaziviv.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/76508492531.pdfIn PDF document text
    • http://livivisobozi.rf.gd/sherlock_holmes_download_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/xuranurosiwovopiv.pdfIn PDF document text
    • http://bolirazebaf.myartsonline.com/introduction_to_naval_architecture_thomas_c_gillmer.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/dotifuselerulaxuga.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/link_picsart_full_pack_gratis.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_off0000daf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF0 5972 bytes
SHA-256: 8c2525476c07d132e9e64c5a862c8399412b2808a1d9ed7cdd83b3c807a132fb
font_01_sfnt_off0000ef31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF31 12848 bytes
SHA-256: 1d098f9d864dd235869f18dcc79ebdd1c6403ac6c61d9fec31936cceeaffe7c4

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