Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc4ea8073e2fb5d…

MALICIOUS

PDF

82.4 KB Created: 2021-06-03 14:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d323d244ac44e7f23fbb6a39ec42fb3b SHA-1: 5deb7753bb765770c98da7a414abcffe7fac7066 SHA-256: 4cc4ea8073e2fb5d19f38c3f7a50935f31651729ea882a7ff9888d31317a014b
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs likely lead to malicious content or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://huntic.ru/pbw?utm_term=what+happens+in+chapter+4+of+number+the+stars PDF link annotation
    • https://pajuxosam.weebly.com/uploads/1/3/0/9/130968950/nujola.pdfIn PDF document text
    • https://pumelagu.weebly.com/uploads/1/3/2/8/132814433/5988104.pdfIn PDF document text
    • https://xokijawajix.weebly.com/uploads/1/3/4/7/134726357/givewa-vetogibepuwarus.pdfIn PDF document text
    • https://sirofutalaga.weebly.com/uploads/1/3/4/7/134706343/kijofi.pdfIn PDF document text
    • https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/74066857.pdfIn PDF document text
    • https://vejiledulibona.weebly.com/uploads/1/3/4/3/134318828/rezivel.pdfIn PDF document text
    • https://zifimebitumane.weebly.com/uploads/1/3/4/2/134236425/779c9f14e4.pdfIn PDF document text
    • https://mebitulipavore.weebly.com/uploads/1/3/4/3/134339985/58eed80be8.pdfIn PDF document text
    • https://sipekenatevare.weebly.com/uploads/1/3/4/7/134776107/8313582.pdfIn PDF document text
    • https://dawawasokiju.weebly.com/uploads/1/3/1/4/131408838/1321848.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/3068c74d-f322-457f-b8d2-f1893d947db2/lodejapaletoxafoded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8361ebd3-9956-4012-ab3e-5c057be015b1/hoover_carpet_cleaning_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e028857e-2b47-45db-9a9f-092a70fabf5c/if_i_pass_a_home_drug_test_will_i_pass_labcorp.pdfIn PDF document text
    • http://fevawigo.pbworks.com/f/m3_data_recovery_full_crack_kuyhaa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/704077ea-2750-4610-86d8-fa982cebab44/17071876851.pdfIn PDF document text
    • http://zigunef.pbworks.com/f/why_is_my_female_dog_leaking_brown_fluid.pdfIn PDF document text
    • http://nagaxop.pbworks.com/w/file/fetch/144538821/tukulenuliz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c3067e-9c14-4feb-884e-75ec92323704/duluxalanirakopuloz.pdfIn PDF document text
    • http://tejudafo.pbworks.com/f/afk_arena_mod_apk_unlimited_money.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144419823/multiplication_facts_1-10_worksheet.pdfIn PDF document text
    • http://pezeliv.pbworks.com/f/rna_transcription_worksheet_answers.pdfIn PDF document text
    • http://zajozote.pbworks.com/w/file/fetch/144438555/ripabiz.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_off0000f63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63C 5344 bytes
SHA-256: 3212cb6099a32eca8b22f3894403482077c6e2a6d45fe8a94561865e262addfa
font_01_sfnt_off00010843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10843 11008 bytes
SHA-256: e72bfe00331e082daec13861a230b4273a58718727860d25dcfe2dc68a4481b0
font_02_sfnt_off00012d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D55 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34