Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea49903acba5f447…

MALICIOUS

PDF

74.4 KB Created: 2021-03-29 06:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9e852da687816620ded7b40b02d8dd6c SHA-1: 1df67d18b89bc84f907b802dc32b4e837f7a09db SHA-256: ea49903acba5f447f79f31aab2f7ecbc5d1a79c9a17efe59975fdcaf0c353e4e
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 0.9996

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://xezojetit.ru/wix?keyword=lack+of+resources+synonym PDF link annotation
    • https://wixoxane.weebly.com/uploads/1/3/4/7/134734379/gonolajivivava.pdfIn PDF document text
    • http://pressit.space/37289592820d9pk4.pdfIn PDF document text
    • http://sovetnik53.ru/52200061522e77fb.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/the_electric_state_movie_castingfw8s4.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/408618587549sw4p.pdfIn PDF document text
    • http://cccckkkkkdd.space/8588144519obqsr.pdfIn PDF document text
    • http://housefashion.ru/how_to_get_certified_in_six_sigma_black_beltjr93c.pdfIn PDF document text
    • https://fapurexetekuwud.weebly.com/uploads/1/3/4/5/134508670/954ac6045c7a.pdfIn PDF document text
    • https://fikijumosoliz.weebly.com/uploads/1/3/5/4/135400707/df6301e8bbb.pdfIn PDF document text
    • https://zaderoxuk.weebly.com/uploads/1/3/4/6/134694825/2853575.pdfIn PDF document text
    • https://xipasole.weebly.com/uploads/1/3/4/8/134853136/vovitemotujemod-rexalukajujen-jasamijorakipar.pdfIn PDF document text
    • http://ru-order-687646765445.art/11699044746dlb5y.pdfIn PDF document text
    • https://nakotugobal.weebly.com/uploads/1/3/5/3/135300729/6735785.pdfIn PDF document text
    • https://janodapos.weebly.com/uploads/1/3/1/6/131636969/3630496.pdfIn PDF document text
    • http://new-volosi.ru/wowetosikijunojavedefitek8klfq.pdfIn PDF document text
    • http://weex.info/pexirevomigusil2nkw.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/6b74c46a78.pdfIn PDF document text
    • http://hushseo.online/brother_mfc_6490cw_prixid48a.pdfIn PDF document text
    • http://sarkife.site/gupasemasojebovenagiqkta2.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/9c94229f-19c5-4125-b5a1-7a7c4f6cb823/zidejigilopirebetekuvum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8828a14c-08ad-462b-b7cb-de7e8cc7b290/88712012173.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_off0000da9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9C 4856 bytes
SHA-256: ca96201f99c04bdef6839c34d0d5a3bb2456c77584cd3b2025e28b8f1a02c83c
font_01_sfnt_off0000eb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 10280 bytes
SHA-256: 79909b014022e3fe71a348e3ea99064bd0ae4a824a6564423be8dfe31da5d123
font_02_sfnt_off00010e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E53 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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