Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed9e5989600dc1a…

MALICIOUS

PDF

70.5 KB Created: 2021-06-10 07:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6cf6a8d5be9ee491e58aa9a7de55aa9d SHA-1: 2332fb29eaf26e638dc0b16feba46ce66f98f2d6 SHA-256: 8ed9e5989600dc1a1ea2bb4dec92cd00f368bb454e321ffccee397c1d2ed9ff2
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, which is characteristic of SEO link farms or phishing campaigns. The presence of embedded URLs and the overall structure suggest it is designed to redirect users to potentially harmful content or facilitate further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://smidgel.ru/pbw?utm_term=avatar+the+last+airbender+team+avatar+tales+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388598/normal_603a8acee120b.pdfIn PDF document text
    • https://gedenotovet.weebly.com/uploads/1/3/1/3/131379555/vasinikasu-sefanumi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490516/normal_600923b8929c6.pdfIn PDF document text
    • https://vogovolakufa.weebly.com/uploads/1/3/4/8/134874318/2927260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501360/normal_6045bfde0aad5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387562/normal_5fc924de64673.pdfIn PDF document text
    • https://bijimeko.weebly.com/uploads/1/3/4/3/134327756/netamafej_tuwibigukax_kimureledu_vanomutug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423453/normal_600236fedfa2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444866/normal_600af46542be8.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/04b5436e-503b-4bf4-9a4a-cddfec6fa25d/bewivexafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/296266f5-5cc6-4b58-a4b3-c61a0021f03d/aviation_merit_badge_workbook_2019.pdfIn PDF document text
    • http://nefusim.pbworks.com/w/file/fetch/144625434/ninaxupubunegobaxatovuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17825f58-ac96-4018-8e7d-57db42be51c9/16662462192.pdfIn PDF document text
    • http://fotowefufet.pbworks.com/f/26362549531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa96cb2-5523-4f92-a0b9-0ce9401089fc/laremevakenimalewubumizuz.pdfIn PDF document text
    • http://savavaze.pbworks.com/w/file/fetch/144473580/is_debt_cancellation_taxable_in_pennsylvania.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/328d2b59-3cd9-4ca6-8d32-d1e9de90a6d7/womipaxuxunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d31b1fb9-2678-4d9d-8b63-3552fdd5003c/what_do_time_capsules_do_in_subnautica.pdfIn PDF document text
    • http://nixefijevumu.pbworks.com/w/file/fetch/144940377/ngo_project_proposal_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0afc5fb-1c2e-4d8b-b3ab-03219c1d0a58/84043834652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1689d581-2f73-486a-a194-72c82b5e6e5f/36629038713.pdfIn PDF document text
    • http://vatumulilugo.pbworks.com/f/59538419698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/544fd777-600d-463c-8620-998e4b8183a4/zijijozebijosug.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_off0000d1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DF 5468 bytes
SHA-256: 6339eab8315fca52f53e060f5cf90e6c9d5a0ed40c2172b8eb9c9ac34c79d63d
font_01_sfnt_off0000e455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE455 13176 bytes
SHA-256: 08de942e26450b60fa48b480d5ad161734089b58627de1dc06e8096f211aa891