Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f4578816644fbf6…

MALICIOUS

PDF

74.5 KB Created: 2021-02-24 05:20:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bcb6d357decb59ce03648bfb336f5ccd SHA-1: d97dd5f088b97a374c0c845ff4f64a5a86bed1bc SHA-256: 3f4578816644fbf6667a6b683399e32bbbfb23b9f16f8b864b1f55f40128c5d9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The primary URL suggests a lure for pirated content, likely to distribute malware or phish for credentials. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wb?keyword=free%20willy%202%20the%20adventure%20home%20full%20movie PDF link annotation
    • http://bekusasodix.iblogger.org/what_are_the_six_core_values_of_social_work.pdfIn PDF document text
    • https://kimidagox.weebly.com/uploads/1/3/4/4/134470984/4531896.pdfIn PDF document text
    • https://xevezuwojuko.weebly.com/uploads/1/3/0/7/130740392/kitofemediboxil.pdfIn PDF document text
    • http://piguzipudoval.iblogger.org/hp_officejet_6700_premium_print_cartridge_cannot_move.pdfIn PDF document text
    • https://wiwazalokapig.weebly.com/uploads/1/3/4/2/134265383/c70bc3dd7.pdfIn PDF document text
    • http://jebuzakawug.iblogger.org/punctuation_worksheet_grade_5.pdfIn PDF document text
    • https://mizewipexu.weebly.com/uploads/1/3/4/6/134609608/garigafofew-waxopakupalubab-zolikiza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://luvesune.epizy.com/personal_allowances_worksheet_line_e_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/fedupofugotanaloderujawu.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/87432131212.pdfIn PDF document text
    • http://bimekikup.epizy.com/vosavijanes.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/22080520476.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/funny_alarm_ringtone_for_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/biztalk_2016_cu2.pdfIn PDF document text
    • http://rozibata.epizy.com/riwuti.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/informant_movie_cast.pdfIn PDF document text
    • http://xasigidokax.rf.gd/fitted_top_sheet_set.pdfIn PDF document text
    • http://tuzekejaxegis.epizy.com/aad_guidelines_atopic_dermatitis.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/4029151870.pdfIn PDF document text
    • http://tujatubaniza.epizy.com/anti_ragging_form_fill_up.pdfIn PDF document text
    • http://sexuduwivaz.rf.gd/wonderland_map_2018.pdfIn PDF document text
    • http://temitugefowe.epizy.com/curriculum_vitae_template_word_online.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/ad_d_2nd_edition_complete_barbarians_handbook.pdfIn PDF document text
    • http://tokegavewori.rf.gd/how_to_win_a_roulette.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_off0000d794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD794 5192 bytes
SHA-256: 4729547d068dcafb88984716c61f54abd6210c909ffaf208d186d12bb5c9b080
font_01_sfnt_off0000e924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE924 10912 bytes
SHA-256: 88bcd55663d9d26c180c35b34a82bd394d61fbbdf7b8862cabadbf65e4b13091
font_02_sfnt_off00010e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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