Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e25ee48583235df…

MALICIOUS

PDF

75.0 KB Created: 2021-03-23 18:41:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e1917632e3a3fab7df9bf712cfe8d49a SHA-1: 105b70d745d16c0ea0d557cd7406aa197ba1b4ad SHA-256: 7e25ee48583235dfd86c6467e7ae1467d08054ca5c638dc89d573c47bc1a8070
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/wix?keyword=avent+manual+pump+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367311/normal_6047ec5990e81.pdfIn PDF document text
    • http://instapodarok365.site/cant_help_falling_in_love_uke_chords_elvis945vj.pdfIn PDF document text
    • http://razvivatel.blog/ziboweboxegobizogobdonyf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490122/normal_601ba74492972.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/computer_networking_a_top-down_approach_amazon.pdfIn PDF document text
    • http://lutirojibafap.sportsontheweb.net/dedironepogadobuvu.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/vosimalume/toastmaster_table_topic_ideas.pdfIn PDF document text
    • http://muwalolerede.epizy.com/epistar_10w_led_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9cd87ba-feb1-4bed-887b-91d608fdd037/nukugiwijewu.pdfIn PDF document text
    • http://lukoleni.epizy.com/bakers_delight_wholemeal_bread_nutritional_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e692f4a-b1b0-4c0f-a583-89b683588ad4/mifuvovadebutavumabadetap.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/82923040145.pdfIn PDF document text
    • http://sumidemeg.epizy.com/majivipinatekazediva.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_off0000e953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE953 4928 bytes
SHA-256: 51d445f42996a13a6e387a48f8249b06bbfe082bea0c7cfc24e7836c500fefaf
font_01_sfnt_off0000fa0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0E 11016 bytes
SHA-256: 82590f7c4dcea382a12b329a62b55bb4a33f890ea8e33badeea95f4d0459748a

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