Malicious PDF — malware analysis report

Static analysis result for SHA-256 41be70a61584a8ac…

MALICIOUS

PDF

84.6 KB Created: 2021-04-20 11:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 199aecc3e6eceec4220b68ff110bfb8c SHA-1: b0f9bbdbd80ae53952baeb925aa7fe42712f6f53 SHA-256: 41be70a61584a8ac6e8e049fd973276ddc4d89f8abc214e58249663fd142f4cd
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search query, likely intended to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/strik?utm_term=how+to+get+custom+tunes+for+bully+dog+gt
    • http://gafabotipunofu.mywebcommunity.org/educational_psychology_meaning.pdf
    • http://kovafuwir.getenjoyment.net/acupressure_points_for_weight_loss.pdf
    • http://xonitaj.mywebcommunity.org/words_of_wisdom_for_new_parents_never_let.pdf
    • http://lazakefezives.mygamesonline.org/triangle_banner_template.pdf
    • http://zisezamerares.mygamesonline.org/baby_boy_names_in_tamil_with_meaning_and_numerology.pdf
    • http://gemobaraza.iblogger.org/arduino_library_for_proteus_8_professional.pdf
    • http://surupumigo.mypressonline.com/baloncesto_en_silla_de_ruedas_historia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wufutogaj.epizy.com/runebibu.pdf
    • https://s3.amazonaws.com/tetenifeme/fozokezaxomuxowajujimo.pdf
    • https://uploads.strikinglycdn.com/files/eb19eb1a-c472-4228-8171-7734496aae1a/xipororamitufobujinogimi.pdf
    • https://s3.amazonaws.com/legesiliv/netflix_apk_hack_free.pdf
    • https://s3.amazonaws.com/besafefaf/66365479962.pdf
    • https://s3.amazonaws.com/xepululejiwof/free_willy_song_michael_jackson_video.pdf
    • http://gigapexolazet.rf.gd/asus_eeebook_x205ta_bios_reset.pdf
    • https://uploads.strikinglycdn.com/files/d728db83-464b-4c1a-8c44-396692f02de2/painting_with_a_twist_houston.pdf
    • http://vubazor.epizy.com/32211147977.pdf
    • https://s3.amazonaws.com/xurixado/payback_2_game_video.pdf
    • https://uploads.strikinglycdn.com/files/d8320fd3-14f6-4f2d-b3ea-5233e6d3dd2c/fijotozomonuk.pdf
    • http://domodevik.rf.gd/20330976765.pdf
    • http://sogoxutagejuno.atwebpages.com/a_clash_of_kings_chapter_47.pdf
    • https://uploads.strikinglycdn.com/files/a32ae342-cb2a-42ec-8115-d100a120ffc1/verizon_g1100_router_cost.pdf
    • https://s3.amazonaws.com/roxawo/school_of_dragons_monstrous_nightmare_names.pdf
    • https://s3.amazonaws.com/daraniwekamidir/80449542170.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5b4.bin
6ac62c118294f83d3c133a3293fa929157f3d51198e2d9d3d57bcdf907e25157		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B4 5424 bytes
font_01_sfnt_off00010830.bin
fd28178adad98d89acb1ddb64054768f4a470bb22ddbbe4c521696511570ad0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10830 11288 bytes
font_02_sfnt_off00012edd.bin
3c72c9b267e4b55aec6f519c44c1823f7844e879e3b635f55d29d08d4c858c73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDD 16288 bytes

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