Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7e8af4194fb750…

MALICIOUS

PDF

79.6 KB Created: 2021-03-22 04:28:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7c61fd27bcc9636716764f89c6bab6ea SHA-1: b413e6c24477c7cec4b9131e685f2741dfe0303a SHA-256: 4e7e8af4194fb750e1b0eecbf95c733affab72fa38435b3987daa83d89158598
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to redirectors and a link farm, indicating an attempt to direct users to malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing or malware distribution technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=how+to+delete+dpf+with+h%2526s+mini+maxx PDF link annotation
    • https://ragesetenavuxom.weebly.com/uploads/1/3/1/6/131606186/fogetu.pdfIn PDF document text
    • https://jibajupo.weebly.com/uploads/1/3/1/6/131636806/437002.pdfIn PDF document text
    • https://marelepo.weebly.com/uploads/1/3/0/7/130738501/6d7b90d7.pdfIn PDF document text
    • http://gasomenuza.iblogger.org/bol_beliya_song_hd_video.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/kupupone.pdfIn PDF document text
    • http://kebukodakaver.iblogger.org/pandoc_markdown_to_table_of_contents.pdfIn PDF document text
    • http://piroluzufu.iblogger.org/27965152619.pdfIn PDF document text
    • http://xukigebek.iblogger.org/metro_2033_redux_chapter_5_walkthrough.pdfIn PDF document text
    • https://turabebusaweni.weebly.com/uploads/1/3/1/4/131438207/vitotuzaje.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://dbaf0f33-3d36-4a74-a587-899e7473781b.filesusr.com/ugd/b914b5_7c848785ce474977b2049a03796c9f8c.pdf?index=trueIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_17ab784b4d014e8bac53424e2094c598.pdf?index=trueIn PDF document text
    • http://bixiwubu.rf.gd/binary_coded_decimal.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/bissell_3624_spotclean_professional_portable_carpet_cleaner_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/what_are_covid_19_rules_in_wales.pdfIn PDF document text
    • http://jopivot.rf.gd/50959362832.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/saaho_video_songs_telugump4._mobi.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/bienestar_general.pdfIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_99d77b1a1d3a4984970479e3e595bf5d.pdf?index=trueIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_bd610f4f59854b0cb3fa0154ef340815.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/ruger_sr9_vs_sr9c.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/nogokozirikudaruforop.pdfIn PDF document text
    • http://bobupugarini.epizy.com/sagutuwigefawexalififa.pdfIn PDF document text
    • https://e53c8fcc-339b-4d8f-83f6-44ddc8c6ace4.filesusr.com/ugd/1ea9c4_d28056c343c2404db7f3c737e4d15a0d.pdf?index=trueIn 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_off0000efe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE7 4380 bytes
SHA-256: 71a3fff2170979c0699a328ef1409e77d6b5aaf97cd88e2b54d642574360990c
font_01_sfnt_off0000fee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE7 10516 bytes
SHA-256: 4c2e2dd063c2621390caaa2a4c74b4d53ee01de783eb2f1d2440dcbc86d7951d
font_02_sfnt_off000122ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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