Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e17f7a8cd01d778…

MALICIOUS

PDF

87.9 KB Created: 2021-03-10 12:27:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 84a0c5eff2335e24032296b930669ff7 SHA-1: b04f4c17892496b74710fddc7447cd6ebfb826a9 SHA-256: 1e17f7a8cd01d7787e83d6790c123aff9dba7c3b6754526c394382553b928c11
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many of which appear to be part of an SEO link farm designed to redirect users. The primary malicious URL identified is https://xajibur.ru/123?utm_term=fha+streamline+refinance+worksheet+2019, which is presented as a lure for a worksheet. No scripts were extracted, but the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?utm_term=fha+streamline+refinance+worksheet+2019 PDF link annotation
    • http://registrat.space/gixolirl3daj.pdfIn PDF document text
    • http://euroshopme.site/idea_data_analysis_software_free_trialnb06b.pdfIn PDF document text
    • http://damvglaz6.xyz/teachers_guide_science_8_digestive_system61sdm.pdfIn PDF document text
    • http://detonic-italy.website/matriz_general_electric_xlstqyej.pdfIn PDF document text
    • http://akb54.ru/how_to_connect_directv_remote_to_receiverk56vj.pdfIn PDF document text
    • http://art-practice.org/adhe_kangal_old_movie_songs_starmusiqkoirm.pdfIn PDF document text
    • http://cashbackmoney.info/argument_essay_gre_templateefmdy.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/lanubili/blood_of_the_dead_blundergat_guide.pdfIn PDF document text
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_1eac32874dd9428e8344e4255ff76982.pdf?index=trueIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_e76dbd00daac473885912ef440b1658b.pdf?index=trueIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_f0168cc6e3f04bc6802b19493ff336dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/conjunction_and_but_worksheets_for_grade_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64da00dd-4241-4d7d-8883-747f4b31b084/ikea_bed_frame_queen_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f091899-65ab-4659-9507-67bbab8bc740/ruxelomikebapukavulidij.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/48879509636.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/remifegudonojobibubuxoref.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/9499206662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/140115c7-67ec-4ea6-83ab-60744291f494/all_of_me_piano_accompaniment_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/jovoxujawosapeja.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/gaxag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5a860ab-dd12-4978-85b9-02ecc9b15d83/98819558495.pdfIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_d486ce5f90324fa296960d98057ede83.pdf?index=trueIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_25eb680e92f148ed9e24bef0cab6bc6f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9506bd2-69a5-4a48-8922-d550964472c2/zulimozebogakorusi.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

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_off00011999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11999 5716 bytes
SHA-256: 690e4fdb8f8f80452930e890ae7ee5fcc6f099f63fc638e7831922a23f1048bf
font_01_sfnt_off00012cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF8 10924 bytes
SHA-256: 93b393c646b93f24e5e0d7f0fefa7b0711dbb73a963c4eaed5f51471935a01c3

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