Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3eec690d4fae267…

MALICIOUS

PDF

67.5 KB Created: 2020-11-14 19:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cbd089e4ff10516e7fc59dbb5dcfc2e5 SHA-1: b933f53a7648ea68168adbf3625f2abe91bdb3cd SHA-256: e3eec690d4fae2673d83c6b0ffdd482d0a9c3472a3eb8ab9f04170a75353b4c9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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.
  • 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://trafftec.ru/123?utm_term=map+of+baja+california+sea+of+cortez PDF link annotation
    • https://nurirekesuvakip.weebly.com/uploads/1/3/4/4/134404885/majebem.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/5948158.pdfIn PDF document text
    • https://benoralegofalaw.weebly.com/uploads/1/3/4/5/134581061/8205127.pdfIn PDF document text
    • https://xajadigosulibab.weebly.com/uploads/1/3/4/6/134650053/f9297c3b88be85.pdfIn PDF document text
    • https://bubawupuga.weebly.com/uploads/1/3/4/3/134380130/1095343.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/3770961.pdfIn PDF document text
    • https://nimewoguvinu.weebly.com/uploads/1/3/4/4/134433183/situvukabipe.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://uploads.strikinglycdn.com/files/d7d2fdfc-5754-4006-b0d2-c8ee857fc991/vesizitixop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5a3095-9973-436c-aaef-cef2e769d59d/fire_hd_8_resolution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5caf169c-dce3-45e9-849d-89396a8c053b/son_of_neptune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b272fc9-d8e8-4916-9a5b-1ae79aded1fb/la_bicicleta_lyrics_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab48b4a3-e60f-4f50-ad8e-7be0db6c7c41/72665187181.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/berliner_platz_1_neu_langenscheidt.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/one_page_business_plan_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49ffb781-3102-4356-acfe-66240a5abf16/92430026513.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/sigegubozotemu.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/puxudovogof.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC4C 5068 bytes
SHA-256: 65fdd1dcea15208b63b5cfe5d6db4799eef7ccd1da92b7d17b54315924493b2f
font_01_sfnt_off0000cd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9A 10684 bytes
SHA-256: 32d8fadb9a78805b45e41353e69e839601511f2d2c0100de81290c868f3ec1d5
font_02_sfnt_off0000f146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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