Malicious PDF — malware analysis report

Static analysis result for SHA-256 a21c4354b93f93e4…

MALICIOUS

PDF

84.5 KB Created: 2021-03-15 10:01:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2a98982288d8499e4c0c5fa5790e9c1e SHA-1: 8c2a679704f45e5ff7f5ba2de485aa5a5868dd45 SHA-256: a21c4354b93f93e4cf929a19f2781e00e0288da4f72eb469901493573857a762
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9994

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://maypoin.ru/wix?keyword=texas+go+math+grade+5+volume+1+answers PDF link annotation
    • http://tujijamutibe.sportsontheweb.net/what_is_my_deepest_fear_poem.pdfIn PDF document text
    • https://komijeji.weebly.com/uploads/1/3/1/6/131606126/7070567.pdfIn PDF document text
    • http://lenorimageb.iblogger.org/43602485017.pdfIn PDF document text
    • http://poguferuliwu.iblogger.org/vavixadujafilegoba.pdfIn PDF document text
    • https://nisivijuwowog.weebly.com/uploads/1/3/0/8/130813757/sovuvexeluzeporuzon.pdfIn PDF document text
    • http://tofugezupeb.mygamesonline.org/9284993370.pdfIn PDF document text
    • https://jatuvukaxakepu.weebly.com/uploads/1/3/4/3/134313635/0ab1ebe898.pdfIn PDF document text
    • http://tijudiwulewanuw.getenjoyment.net/zadinerimujepok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cca3b783-8044-420b-81bf-963af5eb0473/dabuxoduxezisex.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/gejaxoxugefonuferura.pdfIn PDF document text
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_1c1a415cc78846ee8b9c7e6668a1ee8b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadobirak/edward_jones_app_for_android_phone.pdfIn PDF document text
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_4f3ed41ccc654bef8274434b07b76e42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0187b069-fced-4df1-95b7-50302ba90f38/how_many_pages_minimum_for_a_book.pdfIn PDF document text
    • https://e49cd12a-7e53-4a25-9f98-ae37b5ff2e44.filesusr.com/ugd/35dc59_24c4048283dc4518b1178cda9c4509bd.pdf?index=trueIn PDF document text
    • http://poxalurerozelak.epizy.com/pl_sql_interview_questions_and_answers_for_3_experience.pdfIn PDF document text
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_3333e01269a2459cae196899b112a9e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/jurassic_world_alive_1._9_apk.pdfIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_e54e2e35f3d6413480f9dc192104a974.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/79e3c160-e5da-49e7-8766-824b39cfc9e6/agatha_christie_poirot_tv_series_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/dopitimideramekes.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/77469497984.pdfIn PDF document text
    • http://lanesoxulixag.rf.gd/yo_amo_a_paquita_gallego_capitulo_13.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E3 5584 bytes
SHA-256: 5e800e292dcbc08d0ca3c0b693a25ebf6a1bf448693f984853619a5c48cdbcf6
font_01_sfnt_off00011bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD2 11720 bytes
SHA-256: 9488565587e9aa0174c616ef13b598055cb7b9a40ebd3dd14ea679185aba16a4

Open this report in the interactive analyzer, or submit your own file for analysis.