Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e09d5ef052c9e97…

MALICIOUS

PDF

72.4 KB Created: 2021-02-21 23:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b9e73630847efc18e7f2f7b7a0f360b5 SHA-1: 26add030598edd82e511252269a2e6c07ae17f18 SHA-256: 8e09d5ef052c9e97730c616c5b4eeb464ac3db981425843e8ff96c5f94b22f7a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious or unknown domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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/123?utm_term=texas+instruments+ti-nspire+cx+cas+games PDF link annotation
    • http://prizinsta24.online/kejopijepenagbv2kx.pdfIn PDF document text
    • http://groshyk.site/33008558230bzd2o.pdfIn PDF document text
    • https://kopodeju.weebly.com/uploads/1/3/1/4/131483627/nazoz.pdfIn PDF document text
    • http://mritzoliver.design/rexetidf9dl1.pdfIn PDF document text
    • http://timelessdecorum.com/mopavst4l9.pdfIn PDF document text
    • http://money-team.site/studio_54_pics_no_longer_acceptablezf1wj.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/jejulurowev/guidebook_definition_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/46782702249.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/69699967246.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/zidegokefagupupumema.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/ofsted_report_nicholas_breakspear_catholic_school.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/reporter_live_photo_bangla_video_gan.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/construction_company_profile_sample_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/cv_attestation_de_formation_aux_premiers_secours.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/kisurarunebinomaseponuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/rna_isolation_phenol_chloroform_extraction.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/carry_on_my_wayward_son_supernatural_musical_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/6301809741.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/dienes_blocks_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/ff14_carpenter_power_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/sairat_full_movie_720p_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/my_talking_angela_2_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/91034729841.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_off0000cef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF2 5040 bytes
SHA-256: 237e20abb3b2cb357bb91b712473f9afdf54cc9415449048d1b59a8303b5f4dd
font_01_sfnt_off0000e002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE002 10664 bytes
SHA-256: 88038676c4639ce34955221e8a57da9c580c606b9312332a0a8e0ad9a2224a0e
font_02_sfnt_off00010450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10450 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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