Malicious PDF — malware analysis report

Static analysis result for SHA-256 1152f76cad064d2f…

MALICIOUS

PDF

85.7 KB Created: 2021-05-14 01:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 87dd37cbc6ce567f6d324d2a0cfd9d70 SHA-1: 8ea304198069efd0f02dfa0ffdfa76371a4a04ce SHA-256: 1152f76cad064d2fa17b8abd234bdedd87e99d6e7c26daeb05c6fda9dbbdaf78
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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=is+a+thermador+range+worth+it PDF link annotation
    • https://cdn.sqhk.co/norowitidot/hMh9RYX/terowapopalotetafiri.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/pajdqCv/36846342703.pdfIn PDF document text
    • http://clientbluebadge.com/zuvexotutawuwefukuvidikux2r3gg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471513/normal_603e5b7177184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411252/normal_601da3730ad69.pdfIn PDF document text
    • http://teplotronic.ru/58485549378tijq1.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/pengertian_anemia_aplastik.pdfIn PDF document text
    • https://fujazilumekopel.weebly.com/uploads/1/3/2/6/132681311/8bb124bc9a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368962/normal_6002df2e29dbb.pdfIn PDF document text
    • http://umdtheatre.ru/chemistry_lab_report_formzk58z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384819/normal_603727356ef77.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/3dhhyuZ/kenetugowatat.pdfIn PDF document text
    • http://apsmall.space/marine_accident_investigation_reportdu5ww.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/japajupasoda.pdfIn PDF document text
    • https://leniwexobopusez.weebly.com/uploads/1/3/4/7/134713406/babiragan.pdfIn PDF document text
    • http://aycotoro6.xyz/where_does_term_skin_of_my_teeth_come_fromlmiij.pdfIn PDF document text
    • https://bejetatibuket.weebly.com/uploads/1/3/5/9/135957672/3cbdddf2f18d.pdfIn PDF document text
    • http://pojebanidik.mywebcommunity.org/18755413188.pdfIn PDF document text
    • http://fofumumitem.medianewsonline.com/light_out_2_release_date_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377120/normal_601841faa39ef.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/wulagisi/bazufejudug.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/what_are_the_five_creative_arts_disciplines_subjects.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/31207922149.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/what_is_heat_coefficient.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/16106216377.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_off00010ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF3 5236 bytes
SHA-256: 7c8eff0830b72fe751a9a9308cec980b0b3f40c625605c9eaf56d459879f01c1
font_01_sfnt_off000120a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A5 11616 bytes
SHA-256: 6b38d2b4ab19e73f4cbe92b8c43f0801c9f15f21ce14d862b77e3a2051d18494

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