Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aba42bb299bf40c…

MALICIOUS

PDF

77.0 KB Created: 2021-03-30 01:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cc3ae59eb36041fce432688a29d9f9c7 SHA-1: 115f52413b2d9b0d0901188a054902cd2f32e948 SHA-256: 2aba42bb299bf40ca42aa078d24dc81225fb7c205e9e2047c84080b07c58ab45
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 0.9997

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.
  • 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://resalured.ru/strik?utm_term=why+does+my+furnace+keep+tripping+the+reset+button PDF link annotation
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/b634eb60182dd6e.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/xezesalurowogevabewepb56rd.pdfIn PDF document text
    • http://medtechnika1.ru/shogun_rua_record_ufcej02b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_601eb8cd9e7ff.pdfIn PDF document text
    • http://mumopajikex.mygamesonline.org/86358346398.pdfIn PDF document text
    • http://chategratis.online/34228996231s4p3q.pdfIn PDF document text
    • https://pubotaxo.weebly.com/uploads/1/3/5/9/135962756/8256582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418188/normal_601ee92c0e4bb.pdfIn PDF document text
    • https://rogusavonovupe.weebly.com/uploads/1/3/3/9/133997589/145817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460230/normal_6023df46d1f1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424630/normal_5ff32264d47ed.pdfIn PDF document text
    • https://wenabavur.weebly.com/uploads/1/3/1/3/131379405/8147386.pdfIn PDF document text
    • http://visionnew.xyz/tissues_and_integumentary_system_study_guideqb5zb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463543/normal_5ffcd5e026186.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f16f6339-2907-4c53-b9ed-f8e2139f9109/what_causes_a_ge_washer_not_to_spin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e46310-1eb7-4a1c-8211-4220104dd957/dolafanisodorot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b86505e-6dc3-4665-b73d-5cc1f19110ee/tecumseh_ohh60_carburetor_linkage.pdfIn PDF document text
    • http://robefowoved.onlinewebshop.net/18542321772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/622f333d-9045-4094-9951-a6e83939933c/gadasixana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50352bc3-5e30-416c-a8a5-61ef53e4cd4a/tokyo_ghoul_re_season_2_time_skip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f48292b-7b9e-4110-a59a-bcc039919093/tulegizowexotubuwoza.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_off0000ef9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 5856 bytes
SHA-256: 98f823afe82468abd4f9c22b58585e046cc435b11e2423f117f2194ca4ab4bbf
font_01_sfnt_off00010377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10377 10228 bytes
SHA-256: 7cc146a6e55e3afb00f371c7a616a176b61b58f7d1c89f3a87578e1f41ac9ad5

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