Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce23f6edaddda8f8…

MALICIOUS

PDF

93.0 KB Created: 2021-02-20 07:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1ee9bf1ff04fc09935558167305e3fcb SHA-1: 385af52cf5d769b4d55a080547833610ad200e62 SHA-256: ce23f6edaddda8f866ca1cffc62c3768b0bdf55e66a57d0165943469b605f6e0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the overall structure point towards a phishing attack designed to redirect users to malicious content.

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://leonvi.ru/strik?utm_term=what+is+flash+chromatography+used+for PDF link annotation
    • https://pukokisawar.weebly.com/uploads/1/3/4/7/134749025/gadawagebizowo_jukotaduvoded_xolexeparew_vubilikovegi.pdfIn PDF document text
    • http://digtalcaliper09.xyz/graphical_user_interface_programming_with_cplwks.pdfIn PDF document text
    • https://fabisinutufonos.weebly.com/uploads/1/3/5/9/135993578/xavugagil_taxam_xisixot.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuwatipo/9Zghhi8/ivory_paint_color_benjamin_moore.pdfIn PDF document text
    • https://cdn.sqhk.co/doxinotilid/iyZidhj/18781709952.pdfIn PDF document text
    • http://genusttwsr.fun/what_is_the_use_of_dbms_stats.gather_table_stats_in_oraclexfhm5.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/5qicT5t/99554315079.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiren/RIihzKz/himama_daycare_management_app_software_inc.pdfIn PDF document text
    • http://neo-tp.ru/amar_o_depender_completojhr5o.pdfIn PDF document text
    • http://bankrot-biznes.ru/rivevubizitnjhj.pdfIn PDF document text
    • http://lnstagram-badge-verification.com/pamutapixegaluxozurotexh2yz.pdfIn PDF document text
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/3016758.pdfIn PDF document text
    • https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/jovegimaxitepoxufa.pdfIn PDF document text
    • http://ehaberdevlet.com/dibufatarakawakifijuzeg0q5d.pdfIn PDF document text
    • http://italia-doc.fun/paxonovuwimomamufxlfx.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
    • https://s3.amazonaws.com/gomaxod/dunusifogalonipe.pdfIn PDF document text
    • http://fozabenisos.epizy.com/sepefarufelowigo.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/20319024677.pdfIn PDF document text
    • http://kuxuzaxupamul.rf.gd/crop_rotation_pictures_and_information.pdfIn PDF document text
    • http://faxunarin.epizy.com/redistributable_2008_x64.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_off00011efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFA 5460 bytes
SHA-256: 649c85d8f3f744c6fb409c6fefe90a442de3730b921b9f8a647d93e2f1c2b7f3
font_01_sfnt_off00013194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13194 11456 bytes
SHA-256: 488913559add5614c5eec264509e242a15749bc2df14ae3e8bed598b66d3d38e
font_02_sfnt_off0001586d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1586D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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