Malicious PDF — malware analysis report

Static analysis result for SHA-256 95103ad99a394e2b…

MALICIOUS

PDF

78.8 KB Created: 2021-04-07 02:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8f8423216322bfcd805649d9829e299b SHA-1: a52c4ed522cb6c6403a7aacfb612c9352bd99a2c SHA-256: 95103ad99a394e2b25234a682bd3a46cdb7fa4a30fe8c65cd3cb588f6253d26e
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=grammar+practice+worksheets+present+perfect+tense+negative PDF link annotation
    • http://yourdesk.website/divergent_book_1_pagesv1j72.pdfIn PDF document text
    • https://tazowodogakog.weebly.com/uploads/1/3/1/4/131437711/bb96c984479d28.pdfIn PDF document text
    • https://totuseki.weebly.com/uploads/1/3/5/3/135322554/gukeba.pdfIn PDF document text
    • http://wonnaturila.space/audio-technica_at-lp60_fully_automatic_belt-drive_stereo_turntable_redst1bj.pdfIn PDF document text
    • http://bluebadgeform.com/rinofafestfory.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/LjcHQaY/live_weather_radar_map_europe.pdfIn PDF document text
    • https://sufudavinor.weebly.com/uploads/1/3/1/3/131381021/536bf81.pdfIn PDF document text
    • https://jokilexagazoxo.weebly.com/uploads/1/3/4/6/134602179/945463.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/gibLfBY/55085559055.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/RibihvF/54763675617.pdfIn PDF document text
    • https://niraxonaweza.weebly.com/uploads/1/3/4/0/134000156/duxupivumufo_pijaliket_xokabe.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/rogugagatuf/fijabazaridokokotuwatexa.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/the_love_dare_day_11.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/does_landlord_pay_for_carpet_cleaning.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/asus_z97-p_m.2_nvme.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/how_to_write_a_case_report_neurology.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/21189849124.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/xfinity_dvr_not_showing_all_recordings.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/calendario_octubre_2019_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/jeux_de_carte_solitaire_pyramide_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/27983263551.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/newisa.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_off0000f357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF357 5644 bytes
SHA-256: daf9b194c5723e1e3e7e377cea7eaaa44b8febdace5493084874285b04e4ca27
font_01_sfnt_off00010683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10683 10816 bytes
SHA-256: 4613e6be62dab0c8a4ce63a963c22727e048eaaad25ed38ce3d6635822b58f5e

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