Malicious PDF — malware analysis report

Static analysis result for SHA-256 668903928901073e…

MALICIOUS

PDF

79.8 KB Created: 2021-03-18 03:16:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 336a371df747454a508f8120ad0db81f SHA-1: 913b2dd3c5abb8b68a685e6feec3049957b64d1a SHA-256: 668903928901073ecb09ba1a5fc696a815fe6dc402444373fdb430207c1bf333
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 0.9998

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/wix?keyword=raze+unblocked+games+6969 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420019/normal_5fda41d5738f4.pdfIn PDF document text
    • https://cdn.sqhk.co/netimupoxojo/9WhfPhe/zokufezezisutekoteg.pdfIn PDF document text
    • https://cdn.sqhk.co/nepopagugela/c5ibDZH/riwuzimujujeraxo.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/ixSifoE/jumpstart_pre_k_gameplay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485149/normal_5fd74b0412d19.pdfIn PDF document text
    • https://cdn.sqhk.co/daposofoxig/9gffKW8/79172497111.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448100/normal_5ff9f8cf42be8.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/nordictrack_commercial_1750_treadmill_review.pdfIn PDF document text
    • https://cdn.sqhk.co/jivaduzar/Wnie0sD/assassin_corp_mod_apk_android_1.pdfIn PDF document text
    • http://umkatrade.ru/what_are_the_four_factors_that_affect_carrying_capacitypb3tx.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/pobumepaxagiju.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/ZZcX9p4/zugepufujupetudimi.pdfIn PDF document text
    • https://cdn.sqhk.co/kamozipu/bV7EgeM/airport_scanner_pictures.pdfIn PDF document text
    • http://mbfsopg.com/what_to_eat_when_planning_to_get_pregnantr4qvc.pdfIn PDF document text
    • http://rebezun.mygamesonline.org/fugl-meyer_assessment.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
    • http://rawonuruked.rf.gd/navy_blue_wool_coat_ladies.pdfIn PDF document text
    • http://firiwigisu.atwebpages.com/mathematics_attitude_scale.pdfIn PDF document text
    • http://sirowozikuko.epizy.com/confluence_add_jira_report.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/noxejejokuduruge.pdfIn PDF document text
    • http://wokasob.rf.gd/75557747972.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_off0000ea7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7D 5488 bytes
SHA-256: 96ecefc5a3f590b286c9be4c6be89c85d626fa3beb4ec72a3abeb7ddf1d3f39b
font_01_sfnt_off0000fd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD17 12212 bytes
SHA-256: 76483df03e4c5e1a22d9f6d6ca42f52b9a48a2ebd94c8cdc1b9424607db40a45
font_02_sfnt_off00012416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12416 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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