Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f5ab83b89f978f…

MALICIOUS

PDF

73.4 KB Created: 2021-02-20 05:10:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 043cbfae1098c6d5592bba3216b279bf SHA-1: 44694cc3827204ecbeb112f8fea19f4ab5c6b870 SHA-256: 30f5ab83b89f978f524cd96e06a8ea867540fcd647b92baa4a1e5acae7f27271
134 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of numerous external URIs, many hosted on disposable domains, and a 'download button' heuristic suggests a phishing or malware distribution lure. The document body is heavily obfuscated and unreadable, but the overall structure and heuristics point to a malicious PDF designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=zebra+zt410+replace+ribbon PDF link annotation
    • https://cdn.sqhk.co/melivetipi/zifxicY/69617496994.pdfIn PDF document text
    • https://cdn.sqhk.co/koroxofusino/Yifjbgi/37771179018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494874/normal_6002ad55ed921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_601747aace275.pdfIn PDF document text
    • https://cdn.sqhk.co/fapulelenuvi/jcghhgI/84640788229.pdfIn PDF document text
    • http://morpeoplelife.ru/lofolarixugo45rz9.pdfIn PDF document text
    • http://static-start.top/android_studio_output_apk_locationgn6en.pdfIn PDF document text
    • http://edapog.online/82138075451lh0pu.pdfIn PDF document text
    • http://bandalet.club/zizesalafu9ujn4.pdfIn PDF document text
    • http://streamsweets.com/21036686245vj6mk.pdfIn PDF document text
    • http://5-euro.info/duas_from_the_holy_quran_booku9p4h.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/ibaiepD/ditasorapulebomik.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxogubajo/Fge4pjd/graphic_design_software_for_logos.pdfIn PDF document text
    • http://nuverlites.online/nakeziziwipibemabul6wgyn.pdfIn PDF document text
    • https://cdn.sqhk.co/wazotifuk/fDgfjjG/chimparty_playlink_game_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/hihBNwN/41333199114.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470533/normal_5fee4d92bf582.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/VjeaJiz/9476846805.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/vazisi/18022559740.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/borderlands_2_gunzerker_build_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/wumal.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_off0000e099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE099 5180 bytes
SHA-256: 593f378e0c7085e63ca89cd85f08868a3807e941581ec00d95dea2c1d8065a25
font_01_sfnt_off0000f251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF251 10560 bytes
SHA-256: 42a19a13575e51d46962d343c5a1a9bef5e932e9675b80d052a435d692a3fa02

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