Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e2391c3118942f…

MALICIOUS

PDF

85.9 KB Created: 2021-02-23 08:36:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 78e2eab5ac8e14da15d6277adff6dd65 SHA-1: 9b5f84f1604bada9d4393f0eba51e97afc7f74ab SHA-256: 12e2391c3118942f21464c50618dc18a7021f006d5ca30e16c907b149b5becb8
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including a critical ClamAV detection for a phishing trojan. The document body, though partially corrupted, suggests a lure related to setting up a home theater sound bar, directing users to a suspicious URL. The presence of numerous external URIs and a link farm heuristic further indicates malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=how+to+set+up+rca+home+theater+sound+bar PDF link annotation
    • http://fortuneocredit.com/23749698248cv323.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/mini_14_serial_number_18646c92.pdfIn PDF document text
    • http://theboldpantsproject.com/firigozifox1d2uu.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/skyrim_dragon_language_name_generatorz0q4p.pdfIn PDF document text
    • http://nitezebana.iblogger.org/ansys_maxwell_rmxprt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_6016f1cd2dad7.pdfIn PDF document text
    • http://xobokalute.iblogger.org/forklift_operator_job_description_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485161/normal_5fd9f9ba8d09a.pdfIn PDF document text
    • http://supfitket.buzz/soul_stone_simulator_all_itemslnru6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427538/normal_600884db381db.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://davepizu.rf.gd/dujisofifaki.pdfIn PDF document text
    • http://xijidejejinenoz.rf.gd/tizovisagijevado.pdfIn PDF document text
    • http://mevalegija.rf.gd/lodetatodixerupoti.pdfIn PDF document text
    • http://koxowasone.epizy.com/bimal_jalan_report_on_rbi_reserves.pdfIn PDF document text
    • http://saxogif.epizy.com/carpigiani_batch_freezer_manual.pdfIn PDF document text
    • http://kobatalizaz.epizy.com/3203614338.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_off0001073d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073D 5308 bytes
SHA-256: c9032d299b56eb21b5ab0e0ad95e9f258745473b5d3830cae8da586c0dc7f700
font_01_sfnt_off00011925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11925 10404 bytes
SHA-256: a05ebabde928ddfb6f82545977620c5b7851c74d947a64a250b436328de33bfd
font_02_sfnt_off00013c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C88 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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