Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dfa62b16fd46820…

MALICIOUS

PDF

85.7 KB Created: 2021-04-02 13:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9070e4155be6e0a8dd66e169d46175f4 SHA-1: ed000495649352c3defc559bb7e8c6d68cb06b0c SHA-256: 9dfa62b16fd46820a71013dad6b57da8496ba31404de0323326cdfc30fa148bb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO manipulation and potentially phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the primary URL suggests a lure related to academic or technical content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

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://xajibur.ru/award?keyword=strength+of+materials+short+notes+pdf PDF link annotation
    • http://bigijawiv.scienceontheweb.net/wefoganuwusi.pdfIn PDF document text
    • https://cdn.sqhk.co/dodagirojep/hhgV8jb/44152037132.pdfIn PDF document text
    • https://vafunaparixidi.weebly.com/uploads/1/3/4/6/134627598/nezuwolegeg.pdfIn PDF document text
    • http://vuvabadiredowa.getenjoyment.net/lademix.pdfIn PDF document text
    • http://tevojagi.iblogger.org/brochure_cover_page_templates_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/jijfhfL/injustice_gods_among_us_all_characters_unlocked_apk.pdfIn PDF document text
    • https://sexitikimuzulab.weebly.com/uploads/1/3/5/2/135296232/7593310.pdfIn PDF document text
    • http://tigafik.mygamesonline.org/curriculum_vitae_template_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/hkHkigC/98404390656.pdfIn PDF document text
    • http://luwimifamofuper.iblogger.org/evh_5150_iii_50_watt_manual.pdfIn PDF document text
    • https://gusumumonabol.weebly.com/uploads/1/3/0/7/130775475/1f7f47a11c6e5c.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/widuxade/what_is_the_military_death_benefit.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/car_accident_in_india_video.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/dajovisemaxovevidafujova.pdfIn PDF document text
    • http://jibogifimot.epizy.com/infinitive_gerund_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/ensure_insurance_plc_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/sebowabutukafemagebarase.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/cad_drawing_reader_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/exerpeutic_2000_recumbent_bike_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/ronexatalajovuwewobo.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/nulumiw.pdfIn PDF document text
    • http://luxotenudiwuzu.rf.gd/aswamedham_telugu_movie_audio_songs_free.pdfIn PDF document text
    • http://kawerulim.onlinewebshop.net/43979727690.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/gavojoregekopikizopakod.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_off00010dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFB 5560 bytes
SHA-256: e6d30e21c6d070713550070d3e97e7bc78cf3ae0c102f53b7435b895c177f6eb
font_01_sfnt_off000120b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B4 11844 bytes
SHA-256: 62e65d3f2ad323d0f410ff83969a62290533a083e2ebecb7271f3a6fcab833d3

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