Malicious PDF — malware analysis report

Static analysis result for SHA-256 903ae8cd5aa763a1…

MALICIOUS

PDF

74.1 KB Created: 2021-03-03 07:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5f97637e3e5949d4034e1c3baa3ac880 SHA-1: e4f48e7765e12e8dde699bfe772ed3e1e0696ae1 SHA-256: 903ae8cd5aa763a1383e2dc2574e6060df35f606e808ba8b0a068c69a09004bb
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, with ClamAV identifying it as a phishing trojan. The document contains an embedded URL, 'https://jottigo.ru/strik?utm_term=firex+smoke+alarm+two+chirps', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'Firex smoke alarm'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing attempt.

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://jottigo.ru/strik?utm_term=firex+smoke+alarm+two+chirps PDF link annotation
    • https://cdn.sqhk.co/rubogomuweme/ngjkieX/gunblood_game_2_player.pdfIn PDF document text
    • http://casserlabs.xyz/what_is_blind_patriotism_meanxdagy.pdfIn PDF document text
    • http://hookup153.online/98887254358io7li.pdfIn PDF document text
    • http://fortuneo-enligne.com/zowepapomenatopga5v9.pdfIn PDF document text
    • http://tersq.fun/download_crack_alien_shooter_2_conscription4r62o.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/hchfts0/zoho_social_instagram_post.pdfIn PDF document text
    • http://digitalcalakk1.xyz/free_images_500pxtflnv.pdfIn PDF document text
    • http://theandyhong.com/pinepigaspvlu.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/wiwuz.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/hjWiihj/grand_theft_auto_v_the_manual_apk_download.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/taking_sides_clashing_views_in_sustainability.pdfIn PDF document text
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/6602457.pdfIn PDF document text
    • https://zoluwapipapak.weebly.com/uploads/1/3/5/3/135321816/f33c0b.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/alesis_qs8.2_price.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/gazijewevan/uos_challan_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/what_is_the_cost_of_a_sub_zero_refrigerator.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/89731671707.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/vebefugirudot.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/ntr_biopic_songs_telugu_naa.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/king_baudouin_foundation_annual_report.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_off0000e437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE437 5352 bytes
SHA-256: 0cca6bd4e77ebcd2b8b9fd7fd977eea125d431fab3d708369caeb1900984afa4
font_01_sfnt_off0000f658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF658 10700 bytes
SHA-256: b4628221bf0ff699520ab7dbf43e27d052deb3cd7cc995d76768806ae98ff258

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