Malicious PDF — malware analysis report

Static analysis result for SHA-256 2248cf9d43be34cf…

MALICIOUS

PDF

77.3 KB Created: 2021-04-04 11:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ffb296e42cfb2d85c9dc83a6f059328d SHA-1: 5b1e43984b882f8a5704296aac5fb80d3af0aff0 SHA-256: 2248cf9d43be34cf920883f3bcf718fb7f107f83f0c75eaf20ecdeeb7bbef34c
126 Risk Score

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 0.9997

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://bologen.ru/strik?utm_term=xbox+one+wireless+controller+adapter+for+windows+10+walmart PDF link annotation
    • http://wifunagidoli.mypressonline.com/33947382009.pdfIn PDF document text
    • http://delinapod.mypressonline.com/kevap.pdfIn PDF document text
    • https://vobajorod.weebly.com/uploads/1/3/1/4/131438629/lekifojefiw.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/fotenovanegisuvivelu.pdfIn PDF document text
    • http://tryporte.xyz/9837891384342w8z.pdfIn PDF document text
    • https://kumevilowe.weebly.com/uploads/1/3/4/5/134598600/dipezaposavi-vatufuwadof-gibewimenem.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/37110144715.pdfIn PDF document text
    • https://cdn.sqhk.co/sowodopevew/ghcGzF7/dagivadideger.pdfIn PDF document text
    • http://lebuvowune.getenjoyment.net/is_tempstar_a_good_brand_air_conditioner.pdfIn PDF document text
    • https://cdn.sqhk.co/kurinunuwor/ghggdrS/zipebofubum.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/hbwhbnF/62291665605.pdfIn PDF document text
    • http://faxusigeroles.sportsontheweb.net/present_simple_question_form_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/bggRvii/air_control_2_full_version_apk.pdfIn PDF document text
    • http://ilook.market/kivuxotowatonolufubadojo6v73.pdfIn PDF document text
    • http://dusanaputojinon.mygamesonline.org/faxasugokevesi.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/RUUowE8/creeper_mod_minecraft_pe.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/sazomo/kamowumugixuxeduvawegu.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/nadisadovukoxalazurekoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/alimentos_y_bebidas_saludables.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/zirekedi.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_off0000ee4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4F 5772 bytes
SHA-256: 62f3bf2263201a3028c20a9f76cf0d0fe1e16eef3813bccb77d5c512fe8ee10f
font_01_sfnt_off000101f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F9 11032 bytes
SHA-256: a82f4b2ce0697ea95ee0e30591f94ff5a35f1e4d0e4e70f941c19d831af3b9c1

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