Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce66bd8541137a19…

MALICIOUS

PDF

74.1 KB Created: 2021-02-28 11:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: eeda119dcc61870ceba665cf03550bf4 SHA-1: 31311cbb75d742966ba886a16dc1b31c46d95442 SHA-256: ce66bd8541137a1919d42a737405d4cf4803d1975ab6a603d1c12e57d506e577
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing attack. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The 'SE_CLICKFIX' heuristic indicates the document may instruct users to execute commands, a common social engineering tactic to bypass security measures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://gimoguvi.ru/strik?utm_term=convert+pdf+to+word+nitro+pro+10 PDF link annotation
    • http://nesobaka3.xyz/misexarivifalapakefenim1hvz.pdfIn PDF document text
    • http://henrysavbr.site/how_to_be_average_weight_in_rdr2khkpo.pdfIn PDF document text
    • http://zatoboyvibor.fun/dispute_item_on_transunion_credit_reportamasy.pdfIn PDF document text
    • https://subozabi.weebly.com/uploads/1/3/2/7/132710736/sumozerarefoge-ledukunavumo-kabaxemajel-koguk.pdfIn PDF document text
    • https://cdn.sqhk.co/muzexeragod/cjdi9w5/hashtags_to_use_on_instagram_for_edits.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/xobizefekepk6db.pdfIn PDF document text
    • http://vinnipoh.fun/application_definition_black_law_dictionaryg5cky.pdfIn PDF document text
    • https://cdn.sqhk.co/lotidonita/iixhcox/pikajexu.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/gghigfN/smart_event_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/noligigibar/rugijfH/sceptre_tv_50_inch_led.pdfIn PDF document text
    • https://gabexilo.weebly.com/uploads/1/3/4/1/134109250/vusifo.pdfIn PDF document text
    • https://nukivobiwej.weebly.com/uploads/1/3/4/0/134016752/3965967.pdfIn PDF document text
    • http://maewallace.com/mulamejomaluguzodijydjq.pdfIn PDF document text
    • http://hookup754.fun/6431476101dls3h.pdfIn PDF document text
    • http://supfitket.buzz/sonic_cd_classic_apk_mod4c9f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388841/normal_5fc8169f0b80b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FE 4864 bytes
SHA-256: 26609c83f413e4ce1dc336d97a5c432f62e479c29eb6517e12245f8349ea44dd
font_01_sfnt_off0000f6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B9 10740 bytes
SHA-256: 0996b8e9f40e0f35a83708ff5c40076e4933715e2dfe486b0005e3ff2f7eadcf

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