Malicious PDF — malware analysis report

Static analysis result for SHA-256 87db8aa7dadd69b1…

MALICIOUS

PDF

88.5 KB Created: 2021-03-26 02:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 376df9bd78dc61cff82ee96bb8723524 SHA-1: f4bd9fc20502cde46874bba7b5d70daba8c24285 SHA-256: 87db8aa7dadd69b106cf82aec5c36bba47094ddff6f50875edcf7d3f7e9f97a2
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, likely to deliver a phishing lure or a secondary payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://mezovuduw.ru/wix?keyword=gene+expression+transcription+answer+key+pdf
    • http://instasurprise.online/koxigekajozumired24ajz.pdf
    • http://uscreditmonitoring.info/netujux6vw7h.pdf
    • http://copyright-supporthelp.com/how_do_you_say_tell_me_about_yourself_in_spanishfhm73.pdf
    • https://kupolagaxex.weebly.com/uploads/1/3/0/9/130969851/613292.pdf
    • http://rafupofamurawaf.mygamesonline.org/73792483528.pdf
    • http://masito.space/pitipukodexon6vevm.pdf
    • https://cdn.sqhk.co/vifejoneses/hcgcYhI/pmi_lessons_learned_template_free.pdf
    • http://tufuwavaziga.mygamesonline.org/53283043741.pdf
    • https://cdn.sqhk.co/dopuzodopuvu/jteqThg/android_8_dbz_wiki.pdf
    • https://gapojusegora.weebly.com/uploads/1/3/1/4/131408170/woxoz-xetesozumatesa-wibomaxajubo.pdf
    • http://kiwenalod.medianewsonline.com/kitof.pdf
    • http://otshelnik.net/9959456147033vz3.pdf
    • http://meetsoda.club/brother_printer_5450dn_drum_error7e6ab.pdf
    • https://dirotigakavomak.weebly.com/uploads/1/3/4/2/134235834/zegavepe-xuxigev-jupebod.pdf
    • https://cdn.sqhk.co/kagalitisup/hhvihM0/supertuxkart_0._9_3_download.pdf
    • https://kefagifugujog.weebly.com/uploads/1/3/0/8/130813645/tawipo_juxekogerijefu_pukezasi_limuwezebuwa.pdf
    • http://1green.space/frosty_the_snowman_song_lyrics1fbm4.pdf
    • http://natlegend.space/fodmap_food_list_ukvcsv9.pdf
    • https://cdn-cms.f-static.net/uploads/4454973/normal_6031961e2b337.pdf
    • https://cdn-cms.f-static.net/uploads/4501046/normal_603ee26bd70d0.pdf
    • http://fosipuzo.mypressonline.com/how_many_miles_can_a_honda_rebel_250_last.pdf
    • https://cdn-cms.f-static.net/uploads/4413111/normal_604f0bf194ee7.pdf
    • https://sigurapefudaji.weebly.com/uploads/1/3/4/5/134576843/xolojezabu.pdf
    • https://cdn.sqhk.co/ripudilibizo/fvgfjgl/nedoxetuxixa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://widepidaba.atwebpages.com/mijukur.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107b7.bin
b99c62a4d3ac8126c6e4052793e1419a8c450e4df412ea614d66238a7976c638		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107B7 5260 bytes
font_01_sfnt_off000119cc.bin
ba8c0c3d4c73575def299cc749c9898816618d3b30c65e027021832b16928125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119CC 13268 bytes
font_02_sfnt_off00014495.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14495 4324 bytes

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