Malicious PDF — malware analysis report

Static analysis result for SHA-256 6215aac79af287c9…

MALICIOUS

PDF

83.7 KB Created: 2021-03-15 06:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 69810cfa2dcf19ac909c8d1bfb2884f7 SHA-1: ea22433f3258216790e4fcc870a249c6acddda84 SHA-256: 6215aac79af287c917c3281dbe60db467d14d71b64300c91e1cee7a85c13ad94
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/strik?utm_term=sangean+am+fm+radio+reviews PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376369/normal_60410446a1a49.pdfIn PDF document text
    • http://lbaranaydin.com/dora_saves_the_crystal_kingdom_song09wdt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421630/normal_5ff46d9ada9d0.pdfIn PDF document text
    • https://cdn.sqhk.co/sifomujotaxa/hjigeSW/training_programmes_strategy.pdfIn PDF document text
    • http://sosebazud.22web.org/adverbial_conjunctions.pdfIn PDF document text
    • http://eagleaff.com/renixirilatapugadagiwavos9nql.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383156/normal_60090e0d61c29.pdfIn PDF document text
    • https://cdn.sqhk.co/tefebenum/ifhjjg3/tisowupewuwekumikumas.pdfIn PDF document text
    • http://mimawusavap.iblogger.org/56810386807.pdfIn PDF document text
    • http://bestita.space/9525990568f6cun.pdfIn PDF document text
    • https://cdn.sqhk.co/tumexifukevu/giiehhf/jopumewurifazexapadupab.pdfIn PDF document text
    • http://wafowufopenu.22web.org/7470120478.pdfIn PDF document text
    • http://demuxum.getenjoyment.net/3544073600.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371258/normal_5fefec491d5b1.pdfIn PDF document text
    • http://vertigoa.online/wegugozurenezamizijup7f.pdfIn PDF document text
    • http://dress-russia.ru/reading_books_to_learn_englishyi7b5.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
    • https://5057b38b-f250-4925-a5fd-2dbc054a2c1f.filesusr.com/ugd/25ee37_23cfcff6c38a4a718e50890a29f6fb2a.pdf?index=trueIn PDF document text
    • http://luwekexopevom.rf.gd/samsung_s8_infinity_wallpaper.pdfIn PDF document text
    • https://f6b99bba-f064-431f-ab68-6eacb91b2703.filesusr.com/ugd/35e1ce_9ed535f97dde490aa1ae02d545898154.pdf?index=trueIn PDF document text
    • http://nojikigor.myartsonline.com/dirt_devil_power_stick_lite_4_in_1_corded_stick_vacuum.pdfIn PDF document text
    • http://wipadafefuxasi.onlinewebshop.net/bncc_completa.pdfIn PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_d5bf6f1dd2c7466685732b78b93886e9.pdf?index=trueIn PDF document text
    • http://levigorofelo.rf.gd/csi_web_adventures_answers_case_3.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_off0000fbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD2 5160 bytes
SHA-256: 13dd7537a87cdb421cb53696a657b3ac82e7f90bb06c69ddfd77e9bd4f4bc8f0
font_01_sfnt_off00010d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D47 10864 bytes
SHA-256: 7976f338e522d412719c3192cf87b82eecdaf343df0fefe511dc07a2ed10dbfc
font_02_sfnt_off0001320e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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