Malicious PDF — malware analysis report

Static analysis result for SHA-256 092cd577406938b8…

MALICIOUS

PDF

82.6 KB Created: 2021-03-31 15:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 286c5c6420c8fdecc274465eb049e849 SHA-1: d8c1b816f2f6982081e4b5700f189b7f2050f79b SHA-256: 092cd577406938b88311386a9315a0b2ec1def41ad12b437d3e4296dc1c25209
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, with one specifically identified as a malicious redirector. The document body text, though heavily obfuscated, contains keywords related to PDF file size reduction, suggesting a lure to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=reduce+pdf+file+size+adobe+acrobat+standard+dc In PDF document text
    • https://static.s123-cdn-static.com/uploads/4389370/normal_60005bb6e67a9.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/how_to_clean_a_bunn_slush_machine.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/fefunakatukajiwopodutuvuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465264/normal_603d214f52a3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415783/normal_602b37321b08a.pdfIn PDF document text
    • http://wosutopanoba.mygamesonline.org/alcanos_alquenos_y_alquinos_propiedades_fisicas_y_quimicas.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/95605364079.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://wobigubav.epizy.com/41760586179.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/wallpaper_3d_name.pdfIn PDF document text
    • http://tesepesizaz.rf.gd/gosusezufom.pdfIn PDF document text
    • https://42172c5f-463d-425f-bc49-3536d5e9b788.filesusr.com/ugd/3e9aab_c3a87436509c4fb3bf7d182ffa7e7253.pdf?index=trueIn PDF document text
    • http://fijudixisofuzat.rf.gd/mvc_submit_button_outside_form.pdfIn PDF document text
    • http://rojanesifilagu.myartsonline.com/pitokur.pdfIn PDF document text
    • http://magajavopisili.epizy.com/65590238747.pdfIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_5d5e25fd8ac4481aa2b568e36e40b622.pdf?index=trueIn PDF document text
    • http://luxupuxud.myartsonline.com/berserk_manga_plot.pdfIn PDF document text
    • http://bomowufawifebi.rf.gd/mavivogefedo.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/37141560014.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/matlab_call_function_in_same_script.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF809 5228 bytes
SHA-256: 1576f536ad1f0bfbb7f7229946c24bd8c9ba65627ae074f1fb60a48a0e2f6f85
font_01_sfnt_off000109db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DB 10216 bytes
SHA-256: 32b6a01761d66d89982edce6558debeab7e740b6a2272b5ab1ef096a41680d14
font_02_sfnt_off00012cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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